{"product_id":"dbx-540-500-series-tube-mic-preamp-with-optical-compressor","title":"dbx 540 Tube Mic Preamp with Optical Compressor","description":"\u003cp\u003eThe \u003cstrong\u003edbx 540\u003c\/strong\u003e features a Class A tube preamplifier, switchable phantom power, phase invert, selectable -20dB pad, and a super fast in-line optical compressor. The front panel includes a TRS microphone input - a standout feature typically not found on 500-series preamps.\u003cbr\u003e\u003cbr\u003eThe easy-access interchangeable 12AX7 preamp tube allows you to experiment with a variety modern and vintage tubes to customize the 540’s sound and performance to your taste. The switchable (in\/out) compressor provides adjustable attack and release, and when it’s in use, the on-board VU meter automatically changes from displaying master level to amount of gain reduction, so you can view the exact results of the compression being applied. Editing is done using our smooth, responsive hand-machined controls. And last but not least: The dbx 540’s audio circuit uses LME49720 ultra-low distortion\/low noise Op Amps, for superb audio output.\u003cbr\u003e\u003cbr\u003e\r\n\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eMic\/Line Input Connectors: TRS balanced\u003c\/li\u003e\r\n\u003cli\u003eImpedance: 3k Ohms\u003c\/li\u003e\r\n\u003cli\u003eMic Input Gain: 10dB to 60dB\u003c\/li\u003e\r\n\u003cli\u003ePhase Reversal: Switchable\u003c\/li\u003e\r\n\u003cli\u003ePhantom Power: +48V, switchable\u003c\/li\u003e\r\n\u003cli\u003eInstrument Input Connector: 1\/4” jack unbalanced (or XLR from back panel)\u003c\/li\u003e\r\n\u003cli\u003eInstrument Input Gain: 0dB to 45dB\u003c\/li\u003e\r\n\u003cli\u003eOutput Connectors: XLR \u0026amp; 1\/4\" jack (back panel)\u003c\/li\u003e\r\n\u003cli\u003eLine in Frequency Response: 10Hz to 40kHz within 1dB\u003c\/li\u003e\r\n\u003cli\u003eMic in Frequency Response: 10Hz to 40kHz within 2.5dB\u003c\/li\u003e\r\n\u003cli\u003eCompressor Ratio: 1:1 - 10:1\u003c\/li\u003e\r\n\u003cli\u003eCompressor Attack: 1ms - 100ms\u003c\/li\u003e\r\n\u003cli\u003eCompressor Release: 0.1s - 3s\u003c\/li\u003e\r\n\u003cli\u003eShelving filter: 80Hz\u003c\/li\u003e\r\n\u003cli\u003eSlope: 16dB\u003c\/li\u003e\r\n\u003cli\u003eVU meter: -20dBu - +3dBu\u003c\/li\u003e\r\n\u003cli\u003eTHD: 0.05% (unweighted)\u003c\/li\u003e\r\n\u003cli\u003eSignal to Noise: \u0026gt;101dB\u003c\/li\u003e\r\n\u003cli\u003ePower Supply: 500 Series power supply required\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"DBX","offers":[{"title":"Default Title","offer_id":46834446663817,"sku":"53044","price":399.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/8706\/5737\/files\/dbx-540.jpg?v=1780351273","url":"https:\/\/vintage-king-staging.myshopify.com\/products\/dbx-540-500-series-tube-mic-preamp-with-optical-compressor","provider":"Vintage King Staging","version":"1.0","type":"link"}