Item# DBX286SV
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General Specifications

Compressor Threshold Range -40dBu to +20dBu
Compressor Ratio >4:1 For input levels beyond 20dB above threshold
Maximum Compression 30dB
Compressor Attack Time Program-Dependent; >1s for small level increases, down to 10ms for large increases
Compressor Release Time Program-Dependent; adjustable between approximately 1dB/Sec and 75dB/Sec
Compressor Distortion Typically <0.05%THD, 20Hz-20kHz, 15dB G/R, +10dBu Output, Density @ 0
Compressor SMPTE Intermodulation Distortion <0.05%; 60Hz/7kHz 4:1, 15dB G/R, +10dBu Output Level, Density @ 0
De-Esser Characteristic Wideband Gain Reduction
De-Esser Frequency Range 800Hz to 10kHz High Pass, 12dB/octave
De-Esser Release Time Program-Dependent; approximately 1ms/dB
Enhancer HF Detail Characteristic Program-controlled shelving equalizer, approximately 15dB maximum HF boost
Enhancer LF Detail Characteristic Bell-shaped boost @ 80Hz, bell-shaped cut @250Hz, ratio is approximately 2:1
Expander Gate Threshold Range Off ... +15dBu
Expander Gate Expansion Ratio Adjustable 1.5:1 ... 10:1
Expander Gate Maximum Depth >50dB
Expander Gate Attack Time Program-Dependent, approximately 2ms (at maximum attenuation)
Expander Gate Release Rate Program-Dependent, approxiamtely 10ms/dB
Dynamic Range Typically 105dB
Operating Voltage USA
Power Consumption 15 Watts
Operating Temperature 32°F to 113°F (0°C to 45°C)

Audio Specifications

Mic Input Max Level 0.25Vrms, Gain=30dB
Mic Input Gain Adjustment Range +0dB ... +60dB
Mic Input Phantom Power +48VDC, applied to XLR pins 2 and 3 through 6.81kΩ resistors
Mic Input CMRR >40dB, typically 55dB
Mic Input EIN –125dBu, 22Hz-22kHz, 150Ω source impedance
Line Input 1/4" Floating balanced, TIP Hot
Line Input Impedance 10kΩ unbalanced, 20kΩ balanced
Line Input Max Level >+21dBu, balanced or unbalanced
Line Input Gain Adjustment Range -15dB ... +45 dB
Line Input CMRR >40dB, typically 55dB
Insert Input 1/4” TRS phone Normalled; tip is Send, ring is Return
Insert Ring Impedance >5kΩ
Insert Ring Max Level >+21dBu
Insert Tip Impedance 100Ω
Insert Tip Max Level >+21dBu, >+20dBm (600Ω load)
Insert Noise <-89dBu, unweighted (20Hz-20kHz); LINE GAIN Control set to 0dB
Insert Distortion <0.01% THD, 20Hz-20kHz, +10dBu
Line Output 1/4” TRS phone Balanced/Unbalanced
Line Output Impedance 100Ω unbalanced, 200Ω balanced
Line Output Max Level >+21dBu, >+20dBm (600Ω load)
Line Output Gain Adjustment Range -30dB ... +10dB
Line Output Noise <-85dBu unweighted (20Hz-20kHz); Both Gain Controls set for 0dB, all processing controls Off
Line Output Frequency Response 20Hz ... 20kHz, +0.5, -0.5dB
Line Output Distortion <0.08%THD, 20Hz-20kHz, +10dBu, all Processing Controls Off


Weight 6.54 lb (2.97 kg)
Height 1.75 in (4.5 cm)
Depth 5.75 in (14.6 cm)
Width 19 in (48.26 cm)
  • 1 x dbx 286s microphone pre-amp processor
  • 1 x AC power cord
  • 1 x Operation manual
  • 1 x Registration card
  • 4 x Rack mount screws and washers
The dbx® 286s is a full featured Channel Strip Processor that delivers a studio quality microphone/instrument preamplifier and four processors that can be used independently or in any combination. Why mic up vocals and instruments through a noisy, blurry mixer? The sonically pristine dbx 286s Mic Preamp has all the features you need, including wide-ranging input gain control, switchable +48V phantom power, and an 80Hz high-pass filter to remove low frequency hum, rumble or wind. Use the patented dbx OverEasy® compressor to transparently smooth out uneven acoustic tracks or deliver that classic "in your face" vocal performance that only a dbx compressor can. Eliminate vocal sibilance and high frequency distortion from instruments such as cymbals with the frequency tunable De-Esser. Fine-tune the Enhancer HF Detail control to add sparkle and crispness to your tracks and make adjustments to the LF Detail control to add fullness and depth to vocals and bass instruments while cleaning up the muddy low midrange frequencies. And, the separate threshold and ratio controls on the Expander/Gate allow you to subtly reduce headphone leakage or radically gate noisy guitar amps. The dbx 286s offers a full compliment of metering and status LEDs to visually guide you to achieving the right sound. The floating balanced XLR Mic Input accepts balanced or unbalanced inputs to easily connect to professional and home studio microphones. The additional 1/4" TRS Line Input can accept balanced/unbalanced signals to process live electronic instruments or pre-recorded tracks at mixdown. Use the Insert jack to interface between the Mic Preamp and the signal processing sections to "loop out" to external processors (such as EQ or delay unit) or to mix the Mic Preamp's signal out to an external destination. The cost and hassle of patching together multiple processors for use on one track can be frustrating. The dbx 286s provides you with all the mic processing you need in one box, with the shortest, cleanest signal path to keep your music sounding its best!

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