Used BSS DPR404 Quad Compressor/De-Esser
Used BSS DPR404 Quad Compressor/De-Esser is a compact, professional four-channel compressor and de-esser built on BSS's proprietary subtractive gain reduction principle, offering high-quality musical compression alongside independent high-frequency de-essing on each channel. A practical second-hand choice for professional audio environments where ease of operation and economy matter without sacrificing quality. Browse the used BSS DPR404 listings currently available below.
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BSS DPR404 Quad Compressor/De-Esser specifications
| Brand | BSS |
| Segment | Audio |
About the BSS DPR404 Quad Compressor/De-Esser
The BSS DPR404 Quad Compressor/De-Esser delivers four independent channels of compression and high-frequency de-essing using BSS's established subtractive gain reduction approach. Each channel provides up to 30 dB of gain reduction, a fully adjustable soft-knee ratio up to 20:1 hard limiting, automatic adjustment of time constants with two user-definable ranges, and an output gain control with clip LED. Electronically balanced inputs and outputs are fitted throughout. A proprietary activity meter displays below-threshold signal level and gain reduction, while independent tuneable HF de-esser threshold control is included per channel. Designed for straightforward operation by both experienced and novice engineers, the DPR404 is positioned as a compact, economical complement to the DPR-402.
BSS DPR404 Quad Compressor/De-Esser — buyer FAQs
What is the BSS DPR404 and what does it do?
The BSS DPR404 is a compact, professional four-channel compressor and de-esser. Each channel uses BSS's subtractive gain reduction principle to deliver up to 30 dB of gain reduction with a fully adjustable soft-knee ratio up to 20:1 hard limiting. An independent tuneable high-frequency de-esser threshold control is included per channel, and attack and release time constants adjust automatically and continually based on programme material.
Who makes the BSS DPR404 and where does it sit in the BSS range?
BSS Audio, originally Brooke Siren Systems, is a British professional audio brand founded in 1979 and now part of Harman Professional Solutions. The DPR404 sits below the fully featured DPR-402, sharing the same established subtractive gain reduction principle but offering a more compact and economical four-channel solution. It is described as the natural complement to the DPR-402 for situations where ease of operation and lower cost are priorities.
What controls and metering does each channel of the DPR404 offer?
Each channel of the DPR404 includes threshold, ratio and gain controls, a gain reduction meter, a clip LED, below-threshold metering via a proprietary activity meter, bypass switching with LED indicator, and an independent high-frequency de-esser with tuneable filter. Two user-definable time-constant ranges are also provided. Electronically balanced inputs and outputs are fitted throughout the unit.
What kind of audio work is the DPR404 suited to?
The DPR404 is designed for professional audio environments where four channels of compression and high-frequency de-essing are needed in a compact format. Its straightforward controls make it accessible to both experienced and novice engineers, and the inclusion of linking suggests use in stereo or multi-channel configurations. It is positioned as a practical choice where ease of operation and economy are important without sacrificing quality.
What should I check when buying a used BSS DPR404?
On a used DPR404, check that all four channels compress and de-ess correctly, that the gain reduction meters and clip LEDs respond accurately, and that bypass switching functions on every channel. Confirm the electronically balanced inputs and outputs are all intact. Used prices vary with condition and what is included. All listings on 10K Used carry a 21-day warranty covering major functional faults; full details are in the buying guide at https://www.10kused.com/used-av-equipment-guide/.
