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Pro Audio Processors & Accessories

Pro audio processors shape, split and manage a sound system's signal between the source, the mixer and the amplifiers. This page covers rack processors such as graphic equalisers, active crossovers, a compressor/limiter/gate, an enhancer and a speaker management system, and ControlSpace DSP and conferencing processors. Accessories include rack power distribution and conditioning, a USB audio interface, a turntable preamp and a scheduled messaging unit.

Choosing Pro Audio Processors & Accessories

Decide what the processor has to fix or control, then check that its inputs, outputs and rack size suit the rest of the system. Citronic and Bose Professional make most of the range.

EQ, crossovers and dynamics

Graphic equalisers adjust labelled frequency bands with faders: the 170.923UK (CEQ215) is a dual 15-band unit with up to 12dB of cut or boost from 25Hz to 16kHz in 1U, and the CEQ231 is a dual 31-band unit in 2U. Active crossovers send low frequencies to the sub amplifiers and mid/top frequencies to the top amplifiers: the 170.929UK (CX23) is 2-way stereo or 3-way mono with 18dB/octave Butterworth filters, and the 170.932UK (CX34) is 2 or 3-way stereo or 4-way mono with 24dB/octave Linkwitz-Riley filters. The 170.935UK (CL22) compressor/limiter/gate controls dynamic range and can protect loudspeakers, and the 170.938UK (CE22) enhancer/exciter adds harmonic content to dull-sounding audio.

DSP and speaker management

The 170.665UK speaker management system has 2 inputs and 6 outputs with crossovers, EQ and limiters on a 96kHz 32-bit floating point DSP. ControlSpace processors are open-architecture DSPs for installed systems: the 812862-2110 engineered sound processor has 8x8 analog I/O and an AmpLink output, and the 834317-2110 (EX-1280) has twelve mic/line inputs, eight outputs and 64 x 64 Dante connectivity. The 808453-2110 and 808456-2110 commercial sound processors are set up through an onboard CSP configuration utility and a browser interface.

ModelTypeKey detail
170.923UKDual 15-band graphic EQ25Hz to 16kHz, 1U
CEQ231Dual 31-band graphic EQ2U rack space
170.932UKActive crossover (CX34)24dB/octave Linkwitz-Riley
170.665UKSpeaker management DSP2 inputs, 6 outputs, 96kHz
834317-2110ControlSpace EX-1280 DSP64 x 64 Dante
776.498UK8-way IEC power conditionerRFI/EMI filter, 10A

Rack power and accessories

The 776.496UK and 776.498UK are 1U rack units with eight rear IEC outlets and 10A capacity with a circuit breaker; the 776.496UK adds a front IEC outlet and a digital voltmeter, and the 776.498UK an RFI/EMI filter. Other accessories include the 173.650UK USB audio interface with two XLR/jack microphone inputs and an instrument input, the 128.513UK turntable preamp, and the 953.053UK DM-8 messaging unit, which plays up to 99 scheduled events from an SD card.

Related categories

Place processors between mixers and amplifiers and mixers, wire them with XLR and Speakon connectors, or power the rack from rack-mount PDUs.

Brands we stock in Pro Audio Processors & Accessories

Adastra, AV:Link, Bose Professional, C-TEC, Citronic, Hanwha Vision, Penton, QTX and Zenith.

Frequently asked questions

What is an audio processor?

An audio processor is a unit that shapes or controls a sound signal between the mixer and the amplifiers. Common types include graphic equalisers for tone, active crossovers that split frequencies between speakers, compressors and limiters that control level, and DSP units that combine these jobs in an installed system. The range here includes equalisers, crossovers and DSP processors.

  • Established 1975
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Written by the West Midlands Electrics technical team

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