{"product_id":"empirical-labs-docderr-500-series-compressor-eq-preamp","title":"Empirical Labs DocDerr 500 Series Compressor EQ Preamp Module","description":"\u003ch2\u003eEmpirical Labs DocDerr 500 Series Compressor EQ Preamp Module\u003c\/h2\u003e\n\n\u003c!-- Section 1 --\u003e\n\u003cdiv class=\"par-section\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/DocDeer_Horizontal_front_angle_view.png?v=1770001992\" alt=\"Empirical Labs DocDerr 500 series compressor EQ preamp\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eExtremely Low-Noise Preamp and Versatile EQ\u003c\/h2\u003e\n\u003cp\u003eThe DocDerr features an extremely low-noise preamp capable of working with line level or instrument level signals, with a noise floor typically at -91 dBu when Mix is set to zero. An internal jumper can transform the DocDerr into an unparalleled instrument preamp with 16 dB of gain, making it ideal for acoustic guitar, bass, synths, and exotic plucked instruments.\u003c\/p\u003e\n\u003cp\u003eThe EQ section combines a two-position high-pass filter with three parametric bands, each featuring carefully tuned frequency presets. With a frequency response of 3 Hz to 180 kHz on the EQ section (-3 dB points), the DocDerr provides exceptional tonal control across the entire spectrum. Input impedance is 120 kΩ in Instrument In mode and 20 kΩ in balanced Line In mode, with output impedance less than 75 Ω.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 2 --\u003e\n\u003cdiv class=\"par-section reverse\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/docderr_pair-720x569.png?v=1770166933\" alt=\"Empirical Labs DocDerr single knob knee compression\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eBest-in-Class Single Knob Compression\u003c\/h2\u003e\n\u003cp\u003eThe DocDerr's unique dynamics section offers renowned Empirical Labs compression at an unprecedented price point for the 500 series format. Empirical Labs believes it delivers the best single-knob knee compression available in this format, making it incredibly easy to dial in musical compression without extensive parameter tweaking.\u003c\/p\u003e\n\u003cp\u003eCombined with an extremely musical tape emulation circuit that softens and tames high frequencies and transient spikes, the compression section provides natural-sounding dynamics control that sits perfectly in a mix. Distortion ranges between 0.0006% and 10% at 1 kHz depending on mode and settings, allowing everything from pristine transparency to warm analog saturation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Section 3 --\u003e\n\u003cdiv class=\"par-section\"\u003e\n\u003cdiv class=\"par-image\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/docderr_horiz_front-720x433.png?v=1770167007\" alt=\"Empirical Labs DocDerr parallel compression Mix control\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"par-text\"\u003e\n\u003ch2\u003eParallel Compression With Mix Control\u003c\/h2\u003e\n\u003cp\u003eOne of the pivotal features of the DocDerr is the Mix knob, which allows you to blend the uncompressed EQ signal with the compressed and saturated signal. This parallel compression technique has been used by top recording and mixing engineers for many years and unlocks a whole world of sonic possibilities.\u003c\/p\u003e\n\u003cp\u003eBy blending dry and processed signals, you can maintain the natural dynamics and transients of your source while adding thickness, sustain, and harmonic richness. This approach is particularly powerful on drums, bass, vocals, and full mixes where you want both impact and control without sacrificing musicality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eHighlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEmpirical Labs' first compressor in API 500 series format\u003c\/li\u003e\n\u003cli\u003eExtremely low-noise preamp for line or instrument level signals\u003c\/li\u003e\n\u003cli\u003eInternal jumper for 16 dB instrument preamp mode\u003c\/li\u003e\n\u003cli\u003eFour-section EQ: two-position HPF plus three parametric bands with tuned presets\u003c\/li\u003e\n\u003cli\u003eFrequency response: 3 Hz – 180 kHz on EQ section (-3 dB points)\u003c\/li\u003e\n\u003cli\u003eBest-in-class single-knob knee compression\u003c\/li\u003e\n\u003cli\u003eMusical tape emulation circuit for softening HF and transient spikes\u003c\/li\u003e\n\u003cli\u003eParallel compression Mix control for blending dry and processed signals\u003c\/li\u003e\n\u003cli\u003e120 dB dynamic range with -91 dBu typical noise floor\u003c\/li\u003e\n\u003cli\u003eDistortion: 0.0006% to 10% at 1 kHz depending on mode and settings\u003c\/li\u003e\n\u003cli\u003eInput impedance: 120 kΩ (instrument), 20 kΩ (balanced line)\u003c\/li\u003e\n\u003cli\u003eOutput impedance: \u0026lt;75 Ω\u003c\/li\u003e\n\u003cli\u003eMaximum input: +22 dBm (Line In mode)\u003c\/li\u003e\n\u003cli\u003eMaximum output: +28.5 dBm (Mix at 0)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEmpirical Labs DocDerr Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ccc;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc; width: 35%;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc;\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eFormat\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eAPI 500 series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eMulti-purpose tone module (preamp, EQ, compressor, saturation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003ePreamp Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eExtremely low-noise, line or instrument level capable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eInstrument Preamp Mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e16 dB gain (via internal jumper)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eEQ Sections\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eTwo-position high-pass filter, three parametric bands with tuned frequency presets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e3 Hz – 180 kHz on EQ section (-3 dB points)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eDynamic Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e120 dB (max output at 0.5% THD soft clipping to min output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eNoise Floor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eTypically -91 dBu (with Mix at 0)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eTotal Harmonic Distortion\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e0.0006% to 10% at 1 kHz depending on mode and settings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eCompression Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eSingle-knob knee compression with tape emulation circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eParallel Mix Control\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eBlends uncompressed EQ signal with compressed\/saturated signal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eMaximum Input\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e+22 dBm before hard clipping (Line In mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eMaximum Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e+28.5 dBm (Mix at 0)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e120 kΩ (Instrument In mode), 20 kΩ (balanced Line In mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003e\u003cstrong\u003eOutput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eLess than 75 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ccc;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ccc;\"\u003eIncluded Items\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eEmpirical Labs DocDerr 500 Series Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fafafa;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ccc;\"\u003eUser Documentation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Emperical Labs","offers":[{"title":"Default Title","offer_id":47945770926235,"sku":"DocDerr 500","price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/4031\/9643\/files\/docderr_horiz_front-720x433.png?v=1770167007","url":"https:\/\/proaudioreserve.com\/products\/empirical-labs-docderr-500-series-compressor-eq-preamp","provider":"Pro Audio Reserve","version":"1.0","type":"link"}