dbx 286s - Microphone Preamp/Channel Strip

Model #DBX286SV

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Maximum Output 0.25Vrms, Gain = 30dB
Input Impedance ~4.2kΩ
EIN -125dBu, 22Hz to 22kHz, 150Ω source impedance
CMRR >40dB, typically 55dB
Phantom Power +48VDC, applied to XLR pins 2 and 3 through 6.81kΩ resistors
Gain Range 0dB to +60dB


Operating Temperature 32°F to 113°F (0°C to 45°C)
Power Requirements 120VAC 60Hz, 100VAC 50/60Hz15W consumption
Weight 4.5 lb (2.04kg)
Dimensions (WxDxH) 19 x 5.75 x 1.75" (485 x 146 x 45mm)
Specialties Full compliment of meters and status LEDs

Packaging Info

Package Weight 6.45 lb
Box Dimensions (LxWxH) 21.8 x 11.3 x 2.5"

Line Output

Frequency Response 20Hz to 20kHz, +0.5/-0.5dB
Impedance 100Ω unbalanced, 200Ω balanced
Maximum Level >+21dBu, >+20dBm (600Ω load)
Gain Range -30dB to +10dB

Line Input

CMRR >40dB, typically 55dB
Gain Range -15dB to +45 dB
Maximum Level >+21dBu, balanced or unbalanced
Impedance 10kΩ unbalanced, 20kΩ balanced


Maximum Level >+21dBu, >+20dBm (600Ω load)
Impedance Ring: >5kΩTip: 100Ω

General Information

Number of Channels Single
Frequency Response 20Hz to 20kHz, +0.5/-0.5dB
Outputs 1 x 1/4" TRS phone Insert
Inputs 1 x XLR Microphone (p2 hot)1 x 1/4" TRS phone Line1 x 1/4" TRS phone Insert


Dynamic Range Typically 105dB
Gate Threshold OFF to +15dBu
Expansion Ratio Adjustable 1.5:1 to 10:1
Maximum Depth >50dB
Attack Time Program dependent, approximately 2mS (at maximum attenuation)
Release Time Program dependent, approxiamtely 10mS/dB


Threshold Range Not applicable
Ratio Not applicable
Attack Time Not applicable
Filter Type Not applicable
Frequency Bands Not applicable
Bandwidth Not applicable
Range (Boost/Cut) Not applicable
Light Indication


HF Detail Program-controlled shelving equalizer, approximately 15dB maximum HF boost
LF Detail Bell-shaped boost @ 80Hz, bell-shaped cut @250Hz, ratio is approximately 2:1


Characteristics Wideband Gain Reduction
Frequency Range 800Hz to 10kHz High Pass, 12dB/octave
Release Time Program dependent approximately 1mS/dB


SMPTE Intermodulation Distortion:
Slope OverEasy
Sidechain No
Distortion Typically
Release Time Program dependent: adjustable between approximately 1dB/sec and 75dB/sec
Attack Time Program dependent: >1S for small level increases, down to 10mS for large increases
Ratio >4:1 for input levels beyond 20dB above threshold
Threshold Range -40dBu to +20dBu
Product Highlights
  • Single Channel
  • 4 Processors
  • Compressor
  • De-Esser
  • Enhancer
  • Expander/Gate
  • Phantom Power
  • Insert Jack
  • Meters
Still Have Questions?
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