{"title":"Dorrough Meters","description":null,"products":[{"product_id":"dorrough-40-a-meter-racked-pair","title":"Dorrough 40-A Meter (Racked Pair)","description":"\u003cp\u003e\u003cspan\u003eYears of hands-on experience and frustration with both VU and PPM metering led to the development of the DORROUGH Loudness Monitors. DORROUGH’s research has established the relationship between integration time, RMS metering and the display of peak levels.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eDORROUGH\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eLoudness Monitor displays, in an easy-to-read format, the actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal. It allows the operator to ride levels in a manner such that all program material can be adjusted for equal perceived loudness while protecting the peak of the waveform. Now, one meter gives you more complete and more usable information than any combination of peak hold, VU and PPM indicators. The DORROUGH Loudness Monitor integrates on the same scale, two ballistics, showing the relationship between the average and the peak. It simultaneously displays peak and average, and the relative difference, in dB, between these two ballistics is derived from the integration time of the persistence scale.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e The operator has only to adjust the level until either the peak or persistence reference is reached. This will result in the maximum level, regardless of program content. Material with or without compression can easily be matched for the same listening level.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e Each DORROUGH Loudness Monitor features Right and Left inputs for use in stereo mixing applications. With one instrument, the operator can easily see the stereo mix and avoid the classic in-phase\/out-of-phase problem. “Center channel build-up,” the addition of in-phase or monophonic material which causes the mix to be perceived as louder, will appear as a sudden increase in level. This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e \u003cstrong\u003e40 Series\u003c\/strong\u003e\u003cbr\u003e The 40-A series Loudness Meters are considered the standard models with built-in power supplies. They are the large ARC-Style, three color LED display single channel meters.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e The Remote Control is now available for these units and will access the functions of phase correlation display, peak hold, sum\/diff, and activate a reference mode allowing for accurate 0 setting within .1dB. A red LED notification alarm is present on the front of the unit.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e \u003cstrong\u003e40-C\u003c\/strong\u003e\u003cbr\u003e The 40-C has a scale allowing for 20dB of headroom in 1dB steps. The headroom scale is identical to the AES\/EBU Digital Standard.\u003c\/span\u003e\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247371796617,"sku":"8713","price":995.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough_40a_meter_racked_pair_b758df01-78a6-4457-85d0-2922c86b6d29.jpg?v=1784052587"},{"product_id":"dorrough-40-d-dual-rack-kit","title":"Dorrough 40-D Dual Rack Kit","description":"\u003cp\u003e\u003cspan\u003eYears of hands-on experience and frustration with both VU and PPM metering led to the development of the DORROUGH Loudness Monitors. DORROUGH’s research has established the relationship between integration time, RMS metering and the display of peak levels.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eDORROUGH\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eLoudness Monitor displays, in an easy-to-read format, the actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal. It allows the operator to ride levels in a manner such that all program material can be adjusted for equal perceived loudness while protecting the peak of the waveform. Now, one meter gives you more complete and more usable information than any combination of peak hold, VU and PPM indicators. The DORROUGH Loudness Monitor integrates on the same scale, two ballistics, showing the relationship between the average and the peak. It simultaneously displays peak and average, and the relative difference, in dB, between these two ballistics is derived from the integration time of the persistence scale.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e The operator has only to adjust the level until either the peak or persistence reference is reached. This will result in the maximum level, regardless of program content. Material with or without compression can easily be matched for the same listening level.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e Each DORROUGH Loudness Monitor features Right and Left inputs for use in stereo mixing applications. With one instrument, the operator can easily see the stereo mix and avoid the classic in-phase\/out-of-phase problem. “Center channel build-up,” the addition of in-phase or monophonic material which causes the mix to be perceived as louder, will appear as a sudden increase in level. This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e \u003cstrong\u003e40 Series\u003c\/strong\u003e\u003cbr\u003e The 40-A series Loudness Meters are considered the standard models with built-in power supplies. They are the large ARC-Style, three color LED display single channel meters.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e The Remote Control is now available for these units and will access the functions of phase correlation display, peak hold, sum\/diff, and activate a reference mode allowing for accurate 0 setting within .1dB. A red LED notification alarm is present on the front of the unit.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e \u003cstrong\u003e40-C\u003c\/strong\u003e\u003cbr\u003e The 40-C has a scale allowing for 20dB of headroom in 1dB steps. The headroom scale is identical to the AES\/EBU Digital Standard.\u003c\/span\u003e\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247371763849,"sku":"8715","price":45.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough_40_d_dual_rack_kit_23ea7959-1b44-483e-ad72-1b6e2e246876.jpg?v=1784052586"},{"product_id":"dorrough-40-a-meter-single","title":"Dorrough 40-A Meter (Single)","description":"\u003cp\u003e\u003cspan\u003eYears of hands-on experience and frustration with both VU and PPM metering led to the development of the DORROUGH Loudness Monitors. DORROUGH’s research has established the relationship between integration time, RMS metering and the display of peak levels.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eDORROUGH\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eLoudness Monitor displays, in an easy-to-read format, the actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal. It allows the operator to ride levels in a manner such that all program material can be adjusted for equal perceived loudness while protecting the peak of the waveform. Now, one meter gives you more complete and more usable information than any combination of peak hold, VU and PPM indicators. The DORROUGH Loudness Monitor integrates on the same scale, two ballistics, showing the relationship between the average and the peak. It simultaneously displays peak and average, and the relative difference, in dB, between these two ballistics is derived from the integration time of the persistence scale.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e The operator has only to adjust the level until either the peak or persistence reference is reached. This will result in the maximum level, regardless of program content. Material with or without compression can easily be matched for the same listening level.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e Each DORROUGH Loudness Monitor features Right and Left inputs for use in stereo mixing applications. With one instrument, the operator can easily see the stereo mix and avoid the classic in-phase\/out-of-phase problem. “Center channel build-up,” the addition of in-phase or monophonic material which causes the mix to be perceived as louder, will appear as a sudden increase in level. This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e \u003cstrong\u003e40 Series\u003c\/strong\u003e\u003cbr\u003e The 40-A series Loudness Meters are considered the standard models with built-in power supplies. They are the large ARC-Style, three color LED display single channel meters.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e The Remote Control is now available for these units and will access the functions of phase correlation display, peak hold, sum\/diff, and activate a reference mode allowing for accurate 0 setting within .1dB. A red LED notification alarm is present on the front of the unit.\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e \u003cbr\u003e \u003cstrong\u003e40-C\u003c\/strong\u003e\u003cbr\u003e The 40-C has a scale allowing for 20dB of headroom in 1dB steps. The headroom scale is identical to the AES\/EBU Digital Standard.\u003c\/span\u003e\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247371829385,"sku":"8714","price":475.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough-40a_8714_1_ae6a19c4-01bf-4bde-8a4a-aba6130c5352.jpg?v=1784052587"},{"product_id":"dorrough-rw-100-remote-control","title":"Dorrough RW-100 Remote Control","description":"\u003cp\u003eThe \u003cstrong\u003eDorrough Remote Control RW-100\u003c\/strong\u003e is now compatible with all models of Dorrough analog and digital meters.  Button legends on the top apply to analog meters and legends on the bottom apply to digital meters.  Connections to the meters are made through eight-pin mini DIN cables attached to the Alarm\/Remote connector on the rear of the meters.  The RW-100 is powered by the meter(s) to which it is connected, and contains a micro-controller to interrogate and serialize the switch status.  Alarm indicators for up to four meters can be monitored on the RW-100 front panel. In addition, the meter alarm closure feature is also duplicated on the rear panel.\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247371862153,"sku":"8716","price":250.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough_rw_100_remote_control_275dd729-e9b6-4b10-b3c0-d3d530ca2be4.jpg?v=1784052587"},{"product_id":"dorrough-40-b-meter-racked-pair","title":"Dorrough 40-B Meter (Racked Pair)","description":"\u003cdiv\u003e\n\u003cp\u003eYears of hands-on experience and frustration with both VU and PPM metering led to the development of the \u003cstrong\u003eDorrough Loudness Monitors\u003c\/strong\u003e.  Dorrough’s research has established the relationship between integration time, RMS metering and the display of peak levels. \u003cbr\u003e\u003cbr\u003eThe Dorrough Loudness Monitor displays, in an easy-to-read format, the actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal.  It allows the operator to ride levels in a manner such that all program material can be adjusted for equal perceived loudness while protecting the peak of the waveform.  Now, one meter gives you more complete and more usable information than any combination of peak hold, VU and PPM indicators.  The Dorrough Loudness Monitor integrates on the same scale, two ballistics, showing the relationship between the average and the peak.  It simultaneously displays peak and average, and the relative difference, in dB, between these two ballistics is derived from the integration time of the persistence scale. \u003cbr\u003e\u003cbr\u003eThe operator has only to adjust the level until either the peak or persistence reference is reached.  This will result in the maximum level, regardless of program content. Material with or without compression can easily be matched for the same listening level. \u003cbr\u003e\u003cbr\u003eEach Dorrough Loudness Monitor features Right and Left inputs for use in stereo mixing applications. With one instrument, the operator can easily see the stereo mix and avoid the classic in-phase\/out-of-phase problem.  “Center channel build-up,” the addition of in-phase or monophonic material which causes the mix to be perceived as louder, will appear as a sudden increase in level.  This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e40 Series\u003c\/strong\u003e\u003cbr\u003eThe 40-A series Loudness Meters are considered the standard models with built-in power supplies.  They are the large ARC-Style, three color LED display single channel meters. \u003cbr\u003e\u003cbr\u003eThe Remote Control is now available for these units and will access the functions of phase correlation display, peak hold, sum\/diff, and activate a reference mode allowing for accurate 0 setting within .1dB. A red LED notification alarm is present on the front of the unit. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e40-C\u003c\/strong\u003e\u003cbr\u003eThe 40-C has a scale allowing for 20dB of headroom in 1dB steps.  The headroom scale is identical to the AES\/EBU Digital Standard.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247371894921,"sku":"8717","price":995.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough_40b_meter_racked_pair_f264694d-50bc-4dcb-8863-73f9b4486690.jpg?v=1784052587"},{"product_id":"dorrough-40-b-meter-single","title":"Dorrough 40-B Meter (Single)","description":"\u003cdiv\u003e\r\n\u003cp\u003eYears of hands-on experience and frustration with both VU and PPM metering led to the development of the \u003cstrong\u003eDorrough Loudness Monitors\u003c\/strong\u003e.  Dorrough’s research has established the relationship between integration time, RMS metering and the display of peak levels. \u003cbr\u003e\u003cbr\u003eThe Dorrough Loudness Monitor displays, in an easy-to-read format, the actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal.  It allows the operator to ride levels in a manner such that all program material can be adjusted for equal perceived loudness while protecting the peak of the waveform.  Now, one meter gives you more complete and more usable information than any combination of peak hold, VU and PPM indicators.  The Dorrough Loudness Monitor integrates on the same scale, two ballistics, showing the relationship between the average and the peak.  It simultaneously displays peak and average, and the relative difference, in dB, between these two ballistics is derived from the integration time of the persistence scale. \u003cbr\u003e\u003cbr\u003eThe operator has only to adjust the level until either the peak or persistence reference is reached.  This will result in the maximum level, regardless of program content. Material with or without compression can easily be matched for the same listening level. \u003cbr\u003e\u003cbr\u003eEach Dorrough Loudness Monitor features Right and Left inputs for use in stereo mixing applications. With one instrument, the operator can easily see the stereo mix and avoid the classic in-phase\/out-of-phase problem.  “Center channel build-up,” the addition of in-phase or monophonic material which causes the mix to be perceived as louder, will appear as a sudden increase in level.  This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e40 Series\u003c\/strong\u003e\u003cbr\u003eThe 40-A series Loudness Meters are considered the standard models with built-in power supplies.  They are the large ARC-Style, three color LED display single channel meters. \u003cbr\u003e\u003cbr\u003eThe Remote Control is now available for these units and will access the functions of phase correlation display, peak hold, sum\/diff, and activate a reference mode allowing for accurate 0 setting within .1dB. A red LED notification alarm is present on the front of the unit. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e40-C\u003c\/strong\u003e\u003cbr\u003eThe 40-C has a scale allowing for 20dB of headroom in 1dB steps.  The headroom scale is identical to the AES\/EBU Digital Standard.\u003c\/p\u003e\r\n\u003c\/div\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247371927689,"sku":"8718","price":475.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough-40-b-meter_8718_1_21851ee7-b860-4f4b-82b8-d4e3b84f4bbf.jpg?v=1784052587"},{"product_id":"dorrough-40-c-meter-single","title":"Dorrough 40-C Meter (Single)","description":"\u003cdiv\u003e\r\n\u003cp\u003eYears of hands-on experience and frustration with both VU and PPM metering led to the development of the \u003cstrong\u003eDorrough Loudness Monitors\u003c\/strong\u003e.  Dorrough’s research has established the relationship between integration time, RMS metering and the display of peak levels. \u003cbr\u003e\u003cbr\u003eThe Dorrough Loudness Monitor displays, in an easy-to-read format, the actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal.  It allows the operator to ride levels in a manner such that all program material can be adjusted for equal perceived loudness while protecting the peak of the waveform.  Now, one meter gives you more complete and more usable information than any combination of peak hold, VU and PPM indicators.  The Dorrough Loudness Monitor integrates on the same scale, two ballistics, showing the relationship between the average and the peak.  It simultaneously displays peak and average, and the relative difference, in dB, between these two ballistics is derived from the integration time of the persistence scale. \u003cbr\u003e\u003cbr\u003eThe operator has only to adjust the level until either the peak or persistence reference is reached.  This will result in the maximum level, regardless of program content. Material with or without compression can easily be matched for the same listening level. \u003cbr\u003e\u003cbr\u003eEach Dorrough Loudness Monitor features Right and Left inputs for use in stereo mixing applications. With one instrument, the operator can easily see the stereo mix and avoid the classic in-phase\/out-of-phase problem.  “Center channel build-up,” the addition of in-phase or monophonic material which causes the mix to be perceived as louder, will appear as a sudden increase in level.  This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e40 Series\u003c\/strong\u003e\u003cbr\u003eThe 40-A series Loudness Meters are considered the standard models with built-in power supplies.  They are the large ARC-Style, three color LED display single channel meters. \u003cbr\u003e\u003cbr\u003eThe Remote Control is now available for these units and will access the functions of phase correlation display, peak hold, sum\/diff, and activate a reference mode allowing for accurate 0 setting within .1dB. A red LED notification alarm is present on the front of the unit. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e40-C\u003c\/strong\u003e\u003cbr\u003eThe 40-C has a scale allowing for 20dB of headroom in 1dB steps.  The headroom scale is identical to the AES\/EBU Digital Standard.\u003c\/p\u003e\r\n\u003c\/div\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247371960457,"sku":"8719","price":475.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough-40-c_8719_1_2bbdc5b0-2d83-4a0e-bd7e-4a04ce40533f.jpg?v=1784052587"},{"product_id":"dorrough-40-c-meter-racked-pair","title":"Dorrough 40-C Meter (Racked Pair)","description":"\u003cp\u003eYears of hands-on experience and frustration with both VU and PPM metering led to the development of the \u003cstrong\u003eDorrough Loudness Monitors\u003c\/strong\u003e.  Dorrough’s research has established the relationship between integration time, RMS metering and the display of peak levels. \u003cbr\u003e\u003cbr\u003eThe Dorrough Loudness Monitor displays, in an easy-to-read format, the actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal.  It allows the operator to ride levels in a manner such that all program material can be adjusted for equal perceived loudness while protecting the peak of the waveform.  Now, one meter gives you more complete and more usable information than any combination of peak hold, VU and PPM indicators.  The Dorrough Loudness Monitor integrates on the same scale, two ballistics, showing the relationship between the average and the peak.  It simultaneously displays peak and average, and the relative difference, in dB, between these two ballistics is derived from the integration time of the persistence scale. \u003cbr\u003e\u003cbr\u003eThe operator has only to adjust the level until either the peak or persistence reference is reached.  This will result in the maximum level, regardless of program content. Material with or without compression can easily be matched for the same listening level. \u003cbr\u003e\u003cbr\u003eEach Dorrough Loudness Monitor features Right and Left inputs for use in stereo mixing applications. With one instrument, the operator can easily see the stereo mix and avoid the classic in-phase\/out-of-phase problem.  “Center channel build-up,” the addition of in-phase or monophonic material which causes the mix to be perceived as louder, will appear as a sudden increase in level.  This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e40 Series\u003c\/strong\u003e\u003cbr\u003eThe 40-A series Loudness Meters are considered the standard models with built-in power supplies.  They are the large ARC-Style, three color LED display single channel meters. \u003cbr\u003e\u003cbr\u003eThe Remote Control is now available for these units and will access the functions of phase correlation display, peak hold, sum\/diff, and activate a reference mode allowing for accurate 0 setting within .1dB. A red LED notification alarm is present on the front of the unit. \u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e40-C\u003c\/strong\u003e\u003cbr\u003eThe 40-C has a scale allowing for 20dB of headroom in 1dB steps.  The headroom scale is identical to the AES\/EBU Digital Standard.\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247371993225,"sku":"8720","price":995.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough_40b_meter_racked_pair_1_27258586-3610-4a15-957e-c84c2671e749.jpg?v=1784052587"},{"product_id":"dorrough-model-1200","title":"Dorrough Model 1200","description":"\u003cp\u003eThe \u003cspan style=\"font-weight: bold;\"\u003eDorrough Stereo Signal Test Set Model 1200\u003c\/span\u003e is a 2u rack mount instrument, allowing instant dynamic monitoring of audio levels, balance, crosstalk, system gain, signal-to-noise ratios and program \"center-channel build-up.\"  Verifying proper polarity and balance of stereo broadcast lines is a primary application.  Two loudness meters are provided. \u003cbr\u003e\u003cbr\u003e \"Function\", \"Range\", and \"Attenuation\" controls are set in tandem with the meters to achieve all measurements.  Left and right channels are input via loop-thru XLR connectors or a parallel barrier strip.  The back-panel also sports a line-level 1\/4\" stereo output for connection to a scope.  A front mounted amplified, stereo headphone jack is also provided for monitoring. \u003cbr\u003e\u003cbr\u003e A typical application instantly reveals Left\/Right polarity and Phase Compatibility.  First, measure the system gain and adjust the channels for equal Left\/Right readings. Next, a mono signal is fed into both channels.  With the function switch set to \"Sum\/Diff\" adjust the \"Range Attenuator\" and\/or \"High\/Low\" control until a Left meter reading of -6 dB is achieved.  The \"Function\" control is then set to \"Stereo\" and then back to \"Sum\/Diff.\"  Then simply note the difference of Left\/Sum and Right\/Diff meters. Same polarity produces a 6 dB increase on the Left\/Sum meter and no reading on the Right\/Diff meter.  If the readings are reversed, one of the channels has reversed polarity: The Model 1200 helps provides the ultimate in program consistency and quality assurance.\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247378710665,"sku":"10391","price":1650.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough-1200_10391_1.jpg?v=1784052609"},{"product_id":"dorrough-40-b2-custom-desktop-box","title":"Dorrough 40-B2 Custom Desktop Box","description":"Description coming soon.","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247387885705,"sku":"11839","price":120.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough_40_b2_custom_desktop_box_52f77afa-dd80-4395-bd6d-b97cae725079.jpg?v=1784052636"},{"product_id":"dorrough-rw-100-s","title":"Dorrough RW-100-S","description":"Description coming soon.","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247399125129,"sku":"12987","price":45.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough-rw-100-s_12987_1_5169ff52-0931-4d04-8b93-c8710fc108b4.jpg?v=1784052670"},{"product_id":"dorrough-rw-200-remote-control","title":"Dorrough RW-200  Remote Control","description":"\u003cp\u003eThe \u003cstrong\u003eDorrough Remote Control RW-200\u003c\/strong\u003e is now compatible with all models of Dorrough analog and digital meters.  Button legends on the top apply to analog meters and legends on the bottom apply to digital meters.  Connections to the meters are made through eight-pin mini DIN cables attached to the Alarm\/Remote connector on the rear of the meters. The RW-200 is powered by the meter(s) to which it is connected, and contains a micro-controller to interrogate and serialize the switch status.  Alarm indicators for up to four meters can be monitored on the RW-200 front panel. In addition, the meter alarm closure feature is also duplicated on the rear panel.\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247401353353,"sku":"13382","price":250.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough_rw_200__remote_control_d10dc848-8e7d-4791-b7eb-b54721d8a16f.jpg?v=1784052676"},{"product_id":"dorrough-40-s-single-rack-kit","title":"Dorrough 40-s Single Rack Kit","description":"Description coming soon.","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247401386121,"sku":"13383","price":45.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough_40_s_single_rack_kit_736362d9-c162-4d36-b972-317f7b96165f.jpg?v=1784052677"},{"product_id":"dorrough-380-b1v","title":"Dorrough 380-B1V","description":"Custom desktop box for one 380 meter.","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247482257545,"sku":"10949","price":80.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough_380-b1v.jpg?v=1784045140"},{"product_id":"dorrough-380-a","title":"Dorrough 380-A","description":"Small straight line vertical two channel with 14db of headroom.","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247482617993,"sku":"10948","price":850.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough_380-a_1.jpg?v=1784045142"},{"product_id":"dorrough-20-a-meter","title":"Dorrough 20-A Meter","description":"Years of hands-on experience and frustration with both VU and PPM metering led to the development of the DORROUGH Loudness Monitors. DORROUGH’s research has established the relationship between integration time, RMS metering and the display of peak levels. \u003cbr\u003e\u003cbr\u003eThe \u003cb\u003eDORROUGH \u003c\/b\u003eLoudness Monitor displays, in an easy-to-read format, the actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal. It allows the operator to ride levels in a manner such that all program material can be adjusted for equal perceived loudness while protecting the peak of the waveform. Now, one meter gives you more complete and more usable information than any combination of peak hold, VU and PPM indicators. The DORROUGH Loudness Monitor integrates on the same scale, two ballistics, showing the relationship between the average and the peak. It simultaneously displays peak and average, and the relative difference, in dB, between these two ballistics is derived from the integration time of the persistence scale. \u003cbr\u003e\u003cbr\u003eThe operator has only to adjust the level until either the peak or persistence reference is reached. This will result in the maximum level, regardless of program content. Material with or without compression can easily be matched for the same listening level. \u003cbr\u003e\u003cbr\u003eEach DORROUGH Loudness Monitor features Right and Left inputs for use in stereo mixing applications. With one instrument, the operator can easily see the stereo mix and avoid the classic in-phase\/out-of-phase problem. “Center channel build-up,” the addition of in-phase or monophonic material which causes the mix to be perceived as louder, will appear as a sudden increase in level. This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility. \u003cbr\u003e\u003cbr\u003e\u003cb\u003e40 Series\u003c\/b\u003e\u003cbr\u003eThe 40-A series Loudness Meters are considered the standard models with built-in power supplies. They are the large ARC-Style, three color LED display single channel meters. \u003cbr\u003e\u003cbr\u003eThe Remote Control is now available for these units and will access the functions of phase correlation display, peak hold, sum\/diff, and activate a reference mode allowing for accurate 0 setting within .1dB. A red LED notification alarm is present on the front of the unit. \u003cbr\u003e\u003cbr\u003e\u003cb\u003e40-A\u003c\/b\u003e\u003cbr\u003eThe 40-A has a scale showing 14 dB headroom in 1dB steps from +14 to -25.","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247482880137,"sku":"10368","price":475.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough_20-a.jpg?v=1784045143"},{"product_id":"dorrough-40-s-single-rack-kit-demo-deal","title":"Dorrough 40-s Single Rack Kit (Demo Deal)","description":null,"brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47247776710793,"sku":"48214","price":39.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough_40_s_single_rack_kit_1.jpg?v=1784046109"},{"product_id":"dorrough-280-b1-desktop-box","title":"Dorrough 280-B1 Desktop Box","description":"\u003cp\u003eThe \u003cstrong\u003eDorrough 280-B1\u003c\/strong\u003e is a desktop box for one Dorrough 280 horizontal meter.\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47248111960201,"sku":"47365","price":80.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough-280-b1_47365_1_4964765c-523b-49dc-abf6-6eff83d51bb0.jpg?v=1784046823"},{"product_id":"dorrough-280-c-analog-loudness-meter","title":"Dorrough 280 C Analog Loudness Meter","description":"\u003cp\u003eThe \u003cstrong\u003eDorrough 280 C Analog Loudness Meter\u003c\/strong\u003e is a straight line, horizontal two-channel loudness meter with 20 dB of headroom.\u003c\/p\u003e  \u003cp\u003eFor nearly 60 years the world has used two different standards for audio monitoring. In the United States, the VU meter, introduced in 1937, was the standard for level monitoring. In Europe, the PPM (Program Peak Meter) was the standard. The VU meter is a quasi-average reading device. Basically a voltmeter calibrated in power with ballistics chosen to represent early radio and film program material, it was never intended to indicate the peak excursions found in today’s program material.\u003c\/p\u003e  \u003cp\u003eThe PPM addressed the limitations of the VU meter, but because it displays and holds only the peak level of the waveform, the integration time of the quasi-average program level is almost completely ignored.\u003c\/p\u003e  \u003cp\u003eMost contemporary studios have tried to solve their metering problems by using both VU and PPM meters on the same source in an attempt to get the maximum usable level out of a piece of program material. This has led to cramped and overly complex metering bridges and panels, and does not overcome the limitations of these systems. Even the switchable bar graph meters offered as a solution by some console manufacturers suffer from the same ballistic limitations.\u003c\/p\u003e  \u003cp\u003eIn 1980, after years of hands-on experience and frustration with both conventional VU and PPM metering, Dorrough research led to the introduction of the Dorrough Model 40 Loudness Meter. By providing an easy to understand display showing the relationship between integration of RMS and peak level display, the model 40 was an overnight success. Today the model 40 is regarded as the standard in audio monitoring and is used throughout recording and broadcast facilities around the world.\u003c\/p\u003e  \u003cp\u003eThe Dorrough Loudness Meter gives you a much more accurate picture of the actual energy content of audio program material than conventional metering. By simultaneously displaying two ballistics, the Dorrough Loudness Meter shows you the relationship between average and peak. You need only adjust the program level until either the peak or persistence reference is reached. This will result in the maximum level, regardless of program content. Material with or without compression can easily be matched for the same listening level.\u003c\/p\u003e  \u003ch3\u003eInto the Digital Domain\u003c\/h3\u003e  \u003cp\u003eThe Audio Engineering Society (AES), together with the European Broadcasting Union (EBU), have established a digital audio interface standard known as the AES\/EBU interface. This standard provides robust formats for the exchange of digital audio information between professional audio devices, yet also provides flexibility for specialized applications. The International Electrotechnical Commission (IEC) has also endorsed a format based on the AES\/EBU standard for consumer digital audio devices. Briefly, the AES\/EBU format standard defines how two channels of audio information are periodically sampled, uniformly quantized and transmitted over a twisted wire pair. Left and Right audio channels are multiplexed, and the channel is self-clocking and self-synchronizing. The format is independent of sampling frequency and can be used with any sampling frequency including 32 kHz, 44.1 kHz, and 48 kHz, which are those recommended by AES for PCM applications.\u003c\/p\u003e  \u003ch3\u003eThe Dorrough 280 and 380\u003c\/h3\u003e  \u003cp\u003eThe Dorrough model 280 and 380 Digital Loudness Monitors (DLMs) provide the same basic functionality as the classic 40 series analog loudness meter except that they accept a digital data signal and display two channels.\u003c\/p\u003e  \u003cp\u003eThe model 280 is designed for horizontal mounting while the model 380 is designed for vertical mounting. Both models are offered with two scale ranges, a standard 40 dB range (-D suffix), and an expanded 60 dB range (-E suffix). Figure 1-1 illustrates the model 280 with both scale options, while Figure 1-2 shows the model 380 with both scales.\u003c\/p\u003e  \u003ch3\u003eTwo Channel Display\u003c\/h3\u003e  \u003cp\u003eAs defined by the AES\/EBU Digital Audio specification, two audio channels (A and B) are encoded into the serial datastream. On the model 280, Channel A (corresponds to Left), is displayed on the top scale, while Channel B (Right) is displayed on the lower scale. On the model 380, Channel A is displayed on the left scale, and B on the right. When multiple meters are installed in a console, channel designation can be made on the meter bezel (if used), or the meter bridge front panel.\u003c\/p\u003e  \u003ch3\u003eOverrange Indication\u003c\/h3\u003e  \u003cp\u003eOverrange indication occurs when the input signal reaches a point one count over maximum allowed input level. When this happens, the top three LEDs (0, -1, and -2) all change color to red while tracking the program level. Overrange indication is set at the factory to occur at the point one count over the maximum signal level (the maximum level is the point at which the signal becomes all binary 1’s). This point can alternately be set to 4 counts over the maximum signal level by moving a jumper.\u003c\/p\u003e  \u003ch3\u003ePeak Hold Functions\u003c\/h3\u003e  \u003cp\u003eBoth the model 280 and 380 provide three peak hold functions: 3-second peak hold (normal), indefinite peak hold, and no peak hold. These functions are selected through a three-position toggle switch (supplied), or if only a single function is desired, jumper selected on the DLM main circuit board. Normal operation (peak hold for 3-seconds) is provided at the center position of the toggle switch, or through jumpering as described in Section 4 of this book. In this mode, the highest peak is held for 3-seconds before being reset.\u003c\/p\u003e  \u003cp\u003eIndefinite peak hold retains the highest peak that has occurred for an indefinite period while constantly resampling. This function is particularly useful for unattended operation where the engineer wishes to record the highest audio peak occurring during a mastering operation, or at a remote transmitter site, etc. The peak is cleared by switching the toggle switch to normal, then back to indefinite peak hold.\u003c\/p\u003e  \u003cp\u003ePeak hold operation may also be completely defeated. In this mode, peaks are displayed in real time.\u003c\/p\u003e  \u003ch3\u003eCompatibility\u003c\/h3\u003e  \u003cp\u003eConforms to all formats defined within the AES\/EBU Digital Audio specification, including IEC 958, S\/PDIF, and EIAJ CP-340 interface standards. These standards include professional 24-bit and consumer 16-bit formats. Sampling frequencies include 32 kHz, 44.1 kHz, and 48 kHz.\u003c\/p\u003e  \u003ch3\u003eSignal Interface\u003c\/h3\u003e  \u003cp\u003eRS-422 levels over 75-ohm single-ended and 110-ohm balanced inputs. Transformer isolated (as dictated by the EBU specification) with series DC blocking capacitor on input and output. A buffered feed-through is also provided. These signals are not polarized.\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47248111992969,"sku":"47363","price":850.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough-280-c-meter_47363_1_dcaedd33-b00a-46b1-ae1d-f654f9aae9d4.jpg?v=1784046823"},{"product_id":"dorrough-280-d1-rack-adapter-for-two-280-meters","title":"Dorrough 280-D1 Rack Adapter for Two 280 Meters","description":"\u003cp\u003eThe \u003cstrong\u003eDorrough 280-D1\u003c\/strong\u003e is a 19 in rack adapter with cutouts for two Dorrough 280 horizontal meters.\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47248112058505,"sku":"51272","price":45.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough-280-d_51272_1_fb7a7ffa-da17-4964-9233-8cf7cb1efa1b.jpg?v=1784046823"},{"product_id":"dorrough-electronics-280-s-rack-adapter","title":"Dorrough Electronics 280-S Rack Adapter","description":"\u003cp\u003eThe \u003cstrong\u003eDorrough 280-S\u003c\/strong\u003e is a 19 in rack adapter with a cutout for one Dorrough 280 horizontal meter.\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47248112091273,"sku":"48358","price":45.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough-280-s_48358_1_2eff15d8-a3a2-4cfc-a328-1e8461eacd8b.jpg?v=1784046823"},{"product_id":"dorrough-280-b2-desktop-box-for-two-280-meters","title":"Dorrough 280-B2 Desktop Box for Two 280 Meters","description":"\u003cp\u003eThe \u003cstrong\u003eDorrough 280-B2 Desktop Box for Tow 280 Series Meters\u003c\/strong\u003e is wood box made of wood measuring 19\" wide, 3\" high and 7.5\" deep designed to hold two \u003ca href=\"https:\/\/vintageking.com\/dorrough-280-c-analog-loudness-meter\"\u003e280\u003c\/a\u003e meters. The meter is mounted inside on a metal frame. The horizontal meters, are placed side-by-side. It allows use of the meters as a stand-alone unit that does not require a rack mounting system.\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47249081663625,"sku":"183336","price":120.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough-280-b2_183336_1_3b1383f6-f530-409a-a394-58f0cca84466.jpg?v=1784050280"},{"product_id":"dorrough-280-b2-desktop-box-for-two-280-meters-demo-deal","title":"Dorrough 280-B2 Desktop Box for Two 280 Meters (Demo Deal)","description":"\u003cp\u003eThe \u003cstrong\u003eDorrough 280-B2 Desktop Box for Tow 280 Series Meters\u003c\/strong\u003e is wood box made of wood measuring 19\" wide, 3\" high and 7.5\" deep designed to hold two \u003ca href=\"https:\/\/vintageking.com\/dorrough-280-c-analog-loudness-meter\"\u003e280\u003c\/a\u003e meters. The meter is mounted inside on a metal frame. The horizontal meters, are placed side-by-side. It allows use of the meters as a stand-alone unit that does not require a rack mounting system.\u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47249085366409,"sku":"184653","price":99.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough-280-b2_183336_1.jpg?v=1784050305"},{"product_id":"dorrough-40-a-analog-loudness-meter-01496-01497-used","title":"Dorrough 40-A Analog Loudness Meter #01496\/01497 (Used)","description":"\u003cp\u003eThe \u003cstrong\u003eDorrough 40-A Analog Loudness Meter\u003c\/strong\u003e displays, in an easy-to-read format, the actual energy content of the program material, regardless of frequency, while still indicating the peak amplitude of the complex audio signal. It allows the operator to ride levels in a manner such that all program material can be adjusted for equal perceived loudness while protecting the peak of the waveform. Now, one meter gives you more complete and more usable information than any combination of peak hold, VU and PPM indicators. The Dorrough Loudness Monitor integrates on the same scale, two ballistics, showing the relationship between the average and the peak. It simultaneously displays peak and average, and the relative difference, in dB, between these two ballistics is derived from the integration time of the persistence scale. \u003c\/p\u003e  \u003cp\u003eThe operator has only to adjust the level until either the peak or persistence reference is reached. This will result in the maximum level, regardless of program content. Material with or without compression can easily be matched for the same listening level. \u003c\/p\u003e  \u003cp\u003eEach Dorrough Loudness Meter features Right and Left inputs for use in stereo mixing applications. With one instrument, the operator can easily see the stereo mix and avoid the classic in-phase\/out-of-phase problem. “Center channel build-up,” the addition of in-phase or monophonic material which causes the mix to be perceived as louder, will appear as a sudden increase in level. This is especially important in preparing stereo program material for broadcast, while still being able to maintain monaural compatibility. \u003c\/p\u003e","brand":"Dorrough Meters","offers":[{"title":"Default Title","offer_id":47249551884425,"sku":"470748","price":499.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dorrough-40-a-analog-loudness-meter-01496-01497-used_470748_1_0aa5cedb-be59-494f-a3b9-523ec70dcdb9.jpg?v=1784051758"}],"url":"https:\/\/vintage-king-staging.myshopify.com\/collections\/dorrough-meters.oembed","provider":"Vintage King Staging","version":"1.0","type":"link"}