Presonus Audio electronic ACP88 - Manual (Page 2)

ACP88 Technicial Specifications
Number of Channels.................................................................................................................Eight
Dynamic Range ...................................................................................................................>115dB
Signal to Noise Ratio ..............................................................................................................>95dB
Headroom .............................................................................+24dBu, Unbalanced, +18dBu, Balanced
Frequency Response.....................................................................................................10Hz to 50Hz
Crosstalk.................................................................................................................>82dB @ 10kHz
Compression Threshold Range ................................................................................-40dBu to +20dBu
Compression Ratio ..........................................................................................................1:1 to 20:1
Compressor Attack Time..........................................................................................0.02ms to 200ms
Compressor Release Time .......................................................................................0.05sec to 500ms
Auto Attack and Release ......................................................................................Program Dependent
Link .....................................Links any combination of channels 1-8 via proprietary power summing buss
Link Meter..........................................................................................................LED audio sensitive
Gate Threshold Range ...........................................................................................-70dBu to +20dBu
Gate Attack Time....................................................................................................0.01ms to 100ms
Gate Release Time.....................................................................................................0.02ms to 2sec
Gate Attenuation Range .............................................................................................-15dB or -60dB
Input Impedance ..............................................................................................................10k Ohms
Output Impedance..............................................................................................................51 Ohms
THD + Noise .......................................................................................................................<0.02%
Output Gain.............................................................................................................-20dB to +20dB
Compression Curve Types...............................................................................Soft and Hard Knee LED
Compression Metering....................Above/Below Threshold LED and Gain Reduction (seven segment LED)
Gate Metering...................................................................................................Open and Closed LED
Sidechain Output Impedance ...............................................................................................51 Ohms
Sidechain Input Impedance................................................................................................10k Ohms
Gate Input Impedance.......................................................................................................10k Ohms
Internal Operation Level ...............................................................................................+4dBu = 0dB
Input Range .........................................................................................+4dBu or -10dBv (switchable)
Input Connectors ............................................................1/4” Tip Ring Sleeve, Balanced or Unbalanced
Output Connectors ..........................................................1/4” Tip Ring Sleeve, Balanced or Unbalanced
Sidechain Connector ..........................................................................................1/4”, Tip Ring Sleeve
Gate Sidechain Connector...................................................................................1/4”, Tip Ring Sleeve
Power Supply .................................................................................................Internal, Linear Supply
Power Requirements..............................................................100VAC to 120VAC or 200VAC to 240VAC
Main Connection ........................................................................................................IEC Receptacle
Size ..................................................................................................2U Rack 19” W X 3.5” H X 7” D
Weight .................................................................................................................................12 lbs.
ACP88 Architectural & Engineering Specifications
The compressor/limiter/gate shall have eight identical channels, each with an audio frequency response of
10Hz to 50kHz, an electronically floating balanced input impedance of not less than 10k Ohms, balanced
and a maximum input level of not less than +24dBu unbalanced and +18dBu balanced, into a minimum load
impedance of 51 Ohms and 1/4" TRS type connectors. The unit shall also have a compression sidechain with
an input impedance of not less than 10k Ohms and an output impedance of not less than 51Ohms. Sidechain
input/output jack shall be a 1/4" TRS jack. Total Harmonic Distortion plus Noise shall be less than 0.02%.
The unit shall have an Equivalent Input Noise level of not more than -96dBu unweighted, and a dynamic
range of not less than 115dB. Ouput gain adjustment shall be variable from -20 to +20dB. The compression
threshold range shall be variable from -40 to +20dB and the compression ratio shall be variable from 1:1
to infinity:1. The compressor attack and release times shall be selectable for either program dependent or
manually adjustable, scalable operation. The compression ratio characteristic shall be selectable for either
the hard or soft knee curve type with a maximum compression of no less than 40dB. The noise gate shall
have a threshold of - infinity to no less than +20dBu. The gate attack time shall be variable from 10
microseconds to no more than 100 milliseconds. The gate release time shall be variable from .02 to no more
than 2 seconds. The gate range shall be preset for either -60dB or -20dB reduction. All input, output and
sidechain signals shall be via the rear panel. The stereo link shall be of the true RMS summing type with
the previous unlinked channel as the master when linked. The unit shall have the following front panel
switches for each channel: Soft/Hard knee, auto, link, range and bypass. Each channel shall have the following
identical controls: Compressor threshold, compressor ratio, compressor attack, compressor release, gate
threshold, gate attack, gate release, and channel gain make up; and the following identical metering and
indicator LEDs for each channel: Below/Above compressor threshold, compression gain reduction, gate
open/close, and link engaged/disengaged. There shall be a rear panel switch for each channel to select
nominal input and output operation levels at 10dBV or +4dBu. The power requirements shall be 100-120-
VAC 50/60Hz or 200-240VAC, 50/60/Hz, 20W via a detachable IEC type AC cable. The size of the unit shall
be19" X 3.5" X 7" and a weight of 10lbs. (4.54kg). The 2U high, full rack width eight channel compressor/gate
shall be a PreSonus ACP-88.
ACP88