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PreSonus Limited Warranty 
 

PreSonus Audio Electronics Inc. warrants this product to be free of defects in material and workmanship for a period of one year from the date of original retail 
purchase. This warranty is enforceable only by the original retail purchaser. To be protected by this warranty, the purchaser must complete and return the 
enclosed warranty card within 14 days of purchase. During the warranty period PreSonus shall, at its sole and absolute option, either repair or replace, free of 
charge, any product that proves to be defective on inspection by PreSonus or its 

authorized service representative

. To obtain warranty service, the purchaser 

must first call or write PreSonus at the address and telephone number printed below to obtain a Return Authorization Number and instructions of where to return 
the unit for service. All inquiries must be accompanied by a description of the problem. All authorized returns must be sent to the PreSonus repair facility postage 
prepaid, insured and properly packaged. PreSonus reserves the right to update any unit returned for repair. PreSonus reserves the right to change or improve the 
design of the product at any time without prior notice. This warranty does not cover claims for damage due to abuse, neglect, alteration or attempted repair by 
unauthorized personnel, and is limited to failures arising during normal use that are due to defects in material or workmanship in the product. Any implied 
warranties, including implied warranties of merchantability and fitness for a particular purpose, are limited in duration to the length of this limited warranty. Some 
states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. In no event will PreSonus be liable for 
incidental, consequential or other damages resulting from the breach of any express or implied warranty, including, among other things, damage to property, 
damage based on inconvenience or on loss of use of the product, and, to the extent permitted by law, damages for personal injury. Some states do not allow the 
exclusion of limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal 
rights, and you may also have other rights, which vary form state to state. This warranty only applies to products sold and used in the United States of America. 
For warranty information in all other countries please refer to your local distributor. Limited Warranty Outside of The U.S. PreSonus Audio Electronics products are 
warranted only in the country where purchased, through the authorized PreSonus distributor in that country, against defects in material and workmanship. The 
specific period of this limited warranty shall be that which is described to the original retail purchaser by the authorized PreSonus dealer or distributor at the time of 
purchase. PreSonus does not, however, warrant its products against any and all defects: 1) arising Out of materials or workmanship not provided or furnished by 
PreSonus, or 2) resulting from abnormal use of the product or use in violation of instructions, or 3) in products repaired or serviced by other than authorized 
PreSonus repair facilities, or 4) in products with removed or defaced serial numbers, or 5) in components or parts or products expressly warranted by another 
manufacturer. PreSonus agrees, through the applicable authorized distributor, to repair or replace defects covered by this limited warranty with parts or products of 
original or improved design, at its option in each respect, if the defective product is shipped prior to the end of the warranty period to the designated authorized 
PreSonus warranty repair facility in the country where purchased, or to the PreSonus factory in the U.S., in the original packaging or a replacement supplied by 
PreSonus, with all transportation cost and full insurance paid each way by the purchaser or owner. All remedies and the measure of damages are limited to the 
above services. It is possible that economic loss or injury to person or property may result from the failure of the product; however, even if PreSonus has been 
advised of this possibility, this limited warranty does not cover any such consequential or incidental damages. Some states or countries do not allow the limitations 
or exclusion of incidental or consequential damages, so the above limitation may not apply to you. Any and all warranties, express or implied, arising by law, 
course of dealing, course of performance, usage of trade, or otherwise, including but not limited to implied warranties of merchantability and fitness for a particular 
purpose, are limited to a period of two years from either the date of original retail purchase or, in the event no proof of purchase date is available, the date of 
manufacture. Some states or countries do not allow limitations on how long an implied warranty last, so the above limitations may not apply to you. This limited 
warranty gives you specific legal rights, and you may also have other rights which vary from state to state, country to country. 
 
 

PreSonus Audio Electronics, Inc. 
7257 Florida Blvd. 
Baton Rouge, LA 70806 
(225) 216-7887 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Copyright 1998, 2000, 2001, 2007 PreSonus Audio Electronics, Incorporated. All rights reserved.

 

Summary of Contents for ACP88

Page 1: ...ACP88 Eight Channel Compressor Limiter Gate User s Manual Version 1 2 Copyright 1998 2000 2001 2007 PreSonus Audio Electronics Incorporated All rights reserved...

Page 2: ...Audio Electronics products are warranted only in the country where purchased through the authorized PreSonus distributor in that country against defects in material and workmanship The specific period...

Page 3: ...Connections 2 1 Front Panel Basic Layout 4 2 2 Compressor Controls 5 2 3 Gate Controls 8 2 4 Gain 10 2 5 Bypass Link 10 2 6 Patch Panel 11 2 7 Power 13 3 Basic Setup and Applications 3 1 Patching 15 3...

Page 4: ...found in studio or live sound systems We urge you to scan this manual before hooking up your ACP 88 to become familiar with its features and various applications Good luck and enjoy your ACP 88 1 2 F...

Page 5: ...ile channels 1 2 and 6 remain available for independent applications such as compression limiting or gating as the situation dictates Separate Bypass and Gain for Every Channel Each Channel has a sepa...

Page 6: ...and Outputs Your Acp 88 accepts either balanced or unbalanced inputs and outputs using tip ring sleeve TRS connectors 4dBu or 10dBV The internal operating level of your ACP 88 can be switched between...

Page 7: ...Panel Basic Layout Notice that the front panel is divided into eight identical sections These are the eight signal processing chains of the ACP 88 Each channel contains Compressor Limiter Noise Gate...

Page 8: ...utput level versus the input level For example if you have the Ratio set to 2 1 any signal level above the Threshold setting will be compressed at a compression ratio of 2 1 This simple means that tha...

Page 9: ...for compression Release Release sets the length of time the compressor takes to return the Gain reduction back to zero no gain reduction Very short Release times can produce a very choppy or jittery s...

Page 10: ...reduction applied to the signal occurs as soon as the signal exceeds the level set by the threshold With Soft knee compression the onset of gain reduction occurs gradually after the signal has exceede...

Page 11: ...is advisable to use slower Attack times when gating vocals or quieter instruments to avoid what is often described as gate clicking This phenomenon is not made by a mechanical device in the noise gat...

Page 12: ...ld typically be set so that the natural decay of the instrument or vocal being gated is not affected Shorter Release times help to clean up the noise in a signal but may cause chattering in percussive...

Page 13: ...immediate left The Link LED is only active when the signal is present in the Linked channel All of the controls for the Linked channel become disabled and metering occurs by way of the Gain reduction...

Page 14: ...CONNECTIONS 11 2 6 Patch Panel Back Input The Input jack accepts balanced tip ring sleeve or unbalanced tipsleeve connectors The Input can handle up to 24 dBu unbalanced or up to 18 dBu balanced signa...

Page 15: ...e amount of Gain reduction to apply When no connector is inserted into this jack the input signal goes directly to the compressor s control circuitry When a connector is inserted into this jack the si...

Page 16: ...t is not uncommon for condensation to form a film on these contact points Failure to clean these inserts can result in a loss or degradation of signal Should a gate or compressor fail inserting a inch...

Page 17: ...BASIC SETUP APPLICATIONS 15 3 1 Patching Inserting into your mixers insert points...

Page 18: ...BASIC SETUP APPLICATIONS 16 Between multi track recorder inputs outputs to mixer outputs inputs unbalanced...

Page 19: ...hat the input level of the compressor is stable Remember adjusting the signal level being sent to the ACP 88 will require a readjustment of the various parameters of the compressor Turn the Threshold...

Page 20: ...se knob to about the middle position set the Gate Range to 60dB Range Button pushed in adjust the Gate Threshold slowly clockwise until you begin to hear those other drums disappearing Too high of a T...

Page 21: ...chain has an inserted signal the Compressor generates the Gain reduction from the Sidechain return signal only Now if you boost those frequencies associated with sibilance SSS such as 2kHz to 8kHz the...

Page 22: ...BASIC SETUP APPLICATIONS 20 Notes...

Page 23: ...r 60dB Input Impedance 10kOhms Output Impedance 5I Ohms THD Noise 0 02 Output Gain 20dB to 20dB Compression Curve Types Soft Knee or Hard Knee Compressor Metering Above and Below Threshold Gain Reduct...

Page 24: ...TECHNICAL 22 4 2 Block diagram...

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