With ease of operation and low cost, without sacrificing quality and musicality.

The DPR-404from BSS Audio is a compact and professional 4-channel compressor and de-esser. Based on the well established BSS subtractive gain reduction principle, it offers you four independent channels of high quality, musical compression and high frequency de-essing, with the minimum of operator controls.

Attack and release time constants are automatically and continually regulated by dynamic and harmonic content of program material. The DPR-404 features electronically balanced inputs and outputs. The DPR-404 was designed to be quick and easy to operate by both skilled and novice engineers alike.

With our Guaranteed Lowest Price, you can be assured of complete satisfaction and the lowest available price, or your money back!

BSS Audio DPR-404 Quad compressor De-esser Features:

30dB of gain reduction using BSS proprietary subtractive approach.
Fully adjustable soft knee ratio up to 20:1 hard limit.
Automatic adjustment of time constants with two user definable ranges.
Output gain adjustment control with LED clip indicator. BSS proprietary
activity meter showing below threshold signal level, gain reduction and
usable range.
Bypass in/out switching with LED indicator. Independent high frequency de-
esser threshold control and tuneable filter allows selective de-essing
simultaneously with compression.
Twin LEDs show de-ess activity.
Link switching allows adjacent channels to be linked for accurate stereo
working.
One DPR-404 can be selected to process two stereo channels, or one stereo
channel and two independent mono channels, or four independent mono
channels.
Compressor side chain insert on rear panel 1/4" RTS jack.
Electronically balanced inputs and outputs with optional transformer
balancing.

BSS Audio DPR-404 Quad compressor De-esser Specifications:

Input Section
Impedance: Balanced 12k ohm differential
Max. Input Level: + 20dBv
CMRR: better than 50dB, 20Hz to 20Khz
Connector: XLR331 or equivalent

Output Section
Impedance: Balanced and floating to drive 600 ohm loads.
Max. Output Level: +20dBv into 600 Ohm load.
Connector: XLR332 or equivalent.

System Performance
Frequency Response: + 1DB, 20Khz, ultrasonic low pass filter 3db at 32kHz.
Noise: Measured to CCIR 4682, <-86dBv.
Distortion: THD <0.05%, 20Hz to 20kHz.
SMPTE IM: <0.02%.
Crosstalk: <90dB, 20Hz to 20kHz.

Operating Controls
De-ess Frequency: Variable from 10kHz to 10kHz, dynamic HF shelf turnover frequency.
De-ess Threshold: Variable from +20dBv to 30dBv, independent of compressor/limiter settings
Threshold: Variable between +20dBv and 30dBv
Ratio: Variable from 1:1 to infinity:1 (LIMIT) progressive soft to hard knee characteristic
Attack: Program dependent, auto time constant. Nominal 200microsec (30 microsec FAST) for 10% response, and nominal 2ms (300 microsec FAST) for 63% response.
Release: Program dependant, 2 part auto time constant. Nominal 10ms (2ms FAST) to 63% recovery after 4ms overdrive 10db above threshold, and nominal 1s (300ms FAST) to 63% recovery after 40ms overdrive 10dB above threshold.
Gain: Variable from 20dB to +20dB
Link: Stereo linkable in pairs 1/2 and 3/4 Channels 1 and 3 become masters

Metering
Gain Reducton: 8 point LED display showing progressive gain reduction from right to left calibrated in dB's.
Below Threshold: 5 points LED display showing sidechain level below and up to threshold.
Clip: Single LED showing onset of channel clip.

General
Size: 482mm x 44mm x 282mm (19" x 1.75" x 11").
Weight: 5kg (11lbs) gross shippin
Electricity Supply: Switched 120/240V +10% 20% 50/60Hz