DSP-4C front panel showing display and volume knob, with the supplied remote control

DSP-4C

4-channel digital signal processor

£965.00

Incl. shipping and VAT

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DescriptionSpecificationsGuidesDownloads

Engineered for sound

The CoLinear Acoustics DSP-4C is a state-of-the-art multi-channel digital signal processor and preamplifier, purpose-built for advanced room correction, multi-way active crossovers, and speaker/driver alignment in both frequency and time domains. Designed for audio professionals, system integrators, and discerning enthusiasts who require precise control over their acoustic environment.

The DSP-4C accepts stereo input signals and processes them through high-resolution algorithms to provide four independent output channels. Each channel offers comprehensive frequency response shaping, time domain correction, and gain management capabilities. The system is optimised for active speaker designs, room acoustic correction, and multi-driver integration where phase coherence and frequency response accuracy are critical.

Applications include development of active speaker systems, professional studio monitor optimisation, room correction in critical listening environments, and custom installation projects requiring precise acoustic control. The DSP-4C delivers the processing power and reference-grade performance necessary for the most demanding audio applications.

High-precision DSP engine

A 1 GHz SHARC+ processor with inbuilt IIR and FIR accelerators delivers high-speed, low-latency digital signal processing. The internal DSP sampling rate can be set to either 96 kHz or 192 kHz, allowing up to 316 IIR biquads and over 53,000 combined FIR taps for detailed crossover design, correction, and time alignment across all channels.

Cross-platform control

DSPconfig, our intuitive control application, runs on Windows, macOS, and Linux. It offers a fast, visual interface with full access to all parameters, including comprehensive crossover and filter design, time alignment, gain structure, and output configuration.

Reference-grade DAC performance

Digital-to-analogue conversion is handled by dual 2-channel ES9039Q2M DACs with HyperStream IV architecture, which feed a carefully optimised analogue output stage. This combination yields class-leading results, with THD+N as low as -126 dB and dynamic range up to 130 dB (A-weighted). Each of the 4 output channels maintains exceptional linearity and low distortion across the entire frequency spectrum.

System integration

The DSP-4C offers user selectable calibrated full scale voltage output as well as independently configurable single-ended RCA or true balanced XLR outputs. This makes it highly versatile across different amplifiers and active speaker systems, whether in the studio, your hi-fi, or custom installs. Flexible input options include USB, S/PDIF coaxial, and optical connections supporting up to 24 bit / 192 kHz resolution.

Full specifications will be published closer to launch.

Input / output channels

2 / 4

Total harmonic distortion + noiseTHD + N

Up to -126 dB¹ / 0.00005%, unweighted

Dynamic rangeDNR

130 dB¹, A-weighted

Output impedanceZ_OUT

95 Ω (single-ended)190 Ω (balanced)95 Ω (unbal)190 Ω (bal)

Full scale voltage outputFS V_OUT

2.00 V to 2.50 V in 0.05 V steps (single-ended)4.00 V to 5.00 V in 0.10 V steps (balanced)2.00 – 2.50 V (0.05 V steps, unbalanced)4.00 – 5.00 V (0.10 V steps, balanced)

Frequency responseFreq. resp.

20 Hz – 20 kHz +0.0 dB / -0.02 dB20 Hz – 20 kHz +0.0 dB / -0.02 dB

Processing resolutionProcessing res.

32-bit floating point / up to 192 kHz

Processor

1 GHz 32-bit floating point SHARC+ architecture with inbuilt FIR and IIR accelerators

Digital-to-analogue conversionDAC

Dual 2-channel ES9039Q2M DACs with HyperStream IV architecture

Inputsall at up to 24 bit / 192 kHzInputs

1 x USB audio (UAC2)1 x S/PDIF coaxial1 x S/PDIF optical1 x USB audio (UAC2)1 x S/PDIF coaxial1 x S/PDIF opticalall at up to 24 bit / 192 kHz

Outputs

4 x RCA, single-ended4 x XLR, balanced1 x S/PDIF coaxial1 x S/PDIF optical4 x RCA, unbal.4 x XLR, bal.1 x S/PDIF coaxial1 x S/PDIF optical

IIR filters

Input channels: up to 60 biquads, combinedOutput channels: up to 256 biquads, combinedMax 64 per output channel316 biquads

FIR filters

at 96 kHzInput channels: up to 16,384 taps, combinedOutput channels: up to 36,864 taps, combinedat 192 kHzInput channels: up to 9,728 taps, combinedOutput channels: up to 18,432 taps, combinedat 96 kHz53,248 tapsat 192 kHz28,160 taps

Software control

DSPconfigWindows/macOS/LinuxDSPconfig

DimensionsDims

TBA

Weight

TBA

AccessoriesIncluded

1 x infrared remote control1 x 22.5 W universal AC adapter1 x 1.5 m USB-A to USB-B cable1 x remote control1 x AC adapter1 x 1.5 m USB cable

Compliance

CE, UKCA, FCC Part 15 Class BConformity and disposalCE, UKCA, FCCDetails

1. Every channel is hand-calibrated to reach optimum performance; variability of approximately +/-1 dB is expected.

Documentation

The DSP-4C's manuals and guides appear here as they are published.