Product Information

Eight compressors and eight gates in one!

Classic analog dynamics processing.

One of our all-time most popular products, the ACP88 delivers the classic analog compression that helped establish PreSonus as a leading signal-processor manufacturer. With eight independent, linkable, full-featured compressor/limiters and gates, each of which can operate at either +4 dBu or -10 dBV, the ACP88 can solve a host of thorny studio and live-sound problems. Each channel can be independently bypassed so you can audition signals with and without processing. And you can see at a glance what’s going on, thanks to a six-segment LED gain-reduction meter and pair of LEDs that indicate gate position (open/closed) and compression threshold (above/below).

Best-in-class audio.

With top-shelf components and classic analog design, it’s no surprise that the ACP88 delivers best-in-class audio quality. At the heart of the ACP88 is the highly respected THAT 4301s VCA. This VCA has unsurpassed dynamic range, extremely low distortion characteristics, and virtually no noise. Who says they don’t make signal processors like they used to? Nonsense!

A fully variable compressor with the works.

Each of the ACP88’s eight independent channels has a fully variable compressor with a sidechain send and return to enable spectral processing and ducking. In addition to the usual attack, release, ratio, threshold, and makeup gain controls, each compressor offers selectable soft- or hard-knee compression and an Auto Attack feature that applies preprogrammed Attack and Release curves. In short, you get all the parameters and features you expect from a high-end compressor—and we’re just getting started.

Full-featured gates with sidechains.

Each channel of the ACP88 has a dynamic noise gate after the compressor/limiter that can be used to gate an entire drum kit, isolate an instrument, or separate a vocal from background noise. Each gate has attack, release, and threshold controls; a gate-range switch, which determines the amount of level reduction that occurs when the gate closes; and a sidechain/key insert loop that enables the gate to be opened, or “keyed,” in response to a modified version of the program signal or some other external source—great for de-essing, ducking, frequency-dependent gating, and much more.

You can’t do this with most dynamics processors.

With eight independent dynamics processors in one unit, you can employ tricks that aren’t possible with lesser processors. In particular, the Channel Link feature lets you lock together as many channels as you wish, so that all processors follow the setting of the master processor. Since you can create multiple simultaneous link groups, you could link a stereo pair of channels plus a group of four processors and still have two unlinked channels for other applications.

Great old-school processors never get old.

A superb old-school processor, with physical knobs and switches for every parameter, shoehorned into two rackspaces, the ACP88 delivers a pure analog sound that will always be in style. So if you want a professional analog dynamics processor that is every bit as powerful and sonically pleasing as the famous vintage processors were “back when,” go to your favorite PreSonus dealer and check out the ACP88. Because great sound never gets old.

Looking for the perfect dynamics processor for live sound applications like concerts or church PA? Then check out the ACP-88! The ACP-88 is simply loaded with the stuff you need to get the job done right!

Take a look - you get eight separate compressors (hard or soft knee) with full control of threshold, ratio (1:1 -20:1), attack, release, and gain. You also get eight gates with threshold, attack and release controls, your choice of balanced or unbalanced I/O, a sidechain jack on every channel for spectral compression and a separate jack for gate key processing. Improvements over the original ACP-8 include increased dynamic range, better gates, brighter LEDs for low light conditions, and a built-in power supply!

A unique linking function makes it possible for any channel to be linked to the previous! This comprehensive bus can link two to eight channels together in any order as well to create various link groups.


8 independent channels, each with:

  • Full-featured analog compressor/limiter
    • Attack, Release, Ratio, Threshold, and (makeup) Gain controls
    • Auto Attack button
    • Soft/hard knee switch
    • Sidechain send/return
    • 6-segment LED gain-reduction meter
  • Full-featured gate
    • Sidechain/key insert send/return
    • Attack, Release, and Threshold controls
    • Gate-range switch 
  • Bypass switch
  • Channel Link button (can link multiple channels)
  • +4 dBu/-10 dBV operating-level switch
  • Input/Output (For each channel (x 8 channels):
    • 1 balanced ¼” TRS line input
    • 1 balanced ¼” TRS line output
    • 1 unbalanced TRS ¼” compressor sidechain send-return
    • 1 unbalanced TRS ¼” gate sidechain/key insert send-return
  • Physical
    •  2U 19” rack-mountable, rugged steel chassis
    •  Internal power supply with standard IEC connector

Technical Specifications


Number of Channels 8
Dynamic Range >115 dB
Signal-to-Noise Ratio >95 dB
Headroom +24 dBu, Unbalanced +18 dBu, Balanced
Frequency Response 10 Hz to 50 kHz
Crosstalk <82 dB @ 10 kHz
Compression Threshold Range -40 dBu to +20 dBu
Compression Ratio 1:1 to 20:1
Compressor Attack Time 0.02 ms to 200 ms
Compressor Release Time 0.5 ms to 500 ms
Auto Attack and Release Program-dependent
Gate Threshold Range -70 dBu to +20 dBu
Gate Attack Time 0.01 ms to 100 ms
Gate Release Time 0.02 ms to 2 sec
Gate Attenuation Range -15 dB or -60 dB
Input Impedance 10 kΩ
Output Impedance 51Ω
THD + Noise <0.02%
Output Gain -20 dB to +20 dB
Compression Curve Types Hard and Soft Knee
Gate Metering Open and Closed LED
Sidechain Output Impedance 51Ω
Sidechain Input Impedance 10 kΩ
Internal Operation Level +4 dBu=0 dBu
Input Range +4 dBu or -10 dBu
Input Connectors ¼" TRS, Balanced or Unbalanced
Output Connectors ¼" TRS, Balanced or Unbalanced
Compressor Sidechain Connector ¼" TRS
Gate Sidechain Connector ¼" TRS


Power Supply Internal, Linear Supply (factory configured)
Power Requirements 100 VAC to 120 VAC or 200 VAC to 240 VAC
Power Connection IEC Receptacle


Dimensions 2U rackmount
Height 3.5” (88.9 mm)
Depth 17" (431.8 mm)
Width 19” (482.6 mm)
Weight 12 lbs. (5.44 kg)
Current Stock:
Weight: 5.40 KGS
Width: 48.00
Height: 8.90
Depth: 22.00

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