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                        COMP16 
SMART COMPRESSOR 
 
HP4 
HEADPHONE DISTRIBUTION 
AMPLIFIER 
 
EQ3B 
3 BAND PARAMETRIC EQALIZER 
 
USERS MANUAL 
Version 2.0 
PreSonus Audio Electronics                                                                                                                                                                                                                                                                                                                                                     
                    
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                          COMP16  SMART COMPRESSOR    HP4  HEADPHONE DISTRIBUTION  AMPLIFIER    EQ3B  3 BAND PARAMETRIC EQALIZER  USERS MANUAL  Version 1.0        © 2003,  PreSonus Audio Electronics, Incorporated.   All rights reserved.                                                                                                                                                                                                                                                                                                
                    
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                        WARRANTY  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 re
                    
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                        TABLE OF CONTENTS  1 Overview  1.1 Introduction  4  2  Comp16  2.1  A Word About Compression  5  2.2 Front/Back Panel Basic Layout  7  2.3 Presets  9  2.4 Application Guide  14  3 EQ3B  3.1 Front/Back Panel Basic Layout  17  3.2 Application Guide  19  4 HP4  4.1 Front/Back Panel Basic Layout  21  4.2 Application Guide  23  5 Technical Specifications  5.1 COMP16 Specifications  24  5.2 EQ3B Specifications  25  5.3 HP4 Specifications  26  3                                                          
                    
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                        1 INTRODUCTION  1.1 INTRODUCTION    Thank you for purchasing this PreSonus Product.  Your product  was designed with you, the end user in mind.    This device was built with state of the art components to deliver  crystal clear audio for an infinite period of time.  We believe this  unit to be an exceptional sounding unit at an exceptional price.  We  hope you agree.  Feel free to contact us at 1-800-750-0323  anytime for any reason.  We value your comments and  suggestions.  Please pay close at
                    
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                        PRESONUS  2 . 1 A W O RD ABOUT COMPRESSI ON     Punch, apparent loudness, presence… just three of many terms  used to describe the effects of compression/ limiting.   Compression and limiting are forms of dynamic range (volume)  control. Audio signals have very wide peak to average signal level  ratios (sometimes referred to as dynamic range which is the  difference between the loudest level and the softest level). The  peak signal can cause overload in the audio recording or  reproduction chain
                    
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                        PRESONUS  are considered hard limiting.  Limiting refers to the point at which  the signal is restrained from going any louder at the output.    The level of input signal at which the output is reduced is  determined by the compression threshold. As the compression  threshold is lowered, more and more of the input signal is  compressed (assuming a nominal input signal level).  Care must  be taken not to ‘over compress’ a signal.  Too much compression  destroys the acoustical dynamic response of 
                    
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                        PRESONUS  2 . 2 COMP1 6 FRONT PANEL BASI C L A Y O UT    The front panel on the COMP16 is divided into three sections.  These are:  1.  Presets:    Sixteen selectable preset positions.        The Presets for the COMP16 are controlled by this sixteen  position rotary encoder.  As the encoder is rotated,  parameters are digitally switched, simultaneously controlling  attack, release, ratio and threshold.    2.  Controls:     The Input control adjusts the gain on the input amplifier.   Note:  The i
                    
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                        PRESONUS  the overall signal level is lowered, requiring the user to  ‘makeup’ the gain thereby restoring the original signal level.     Output to Meter     This button selects the function of the Output/Gain  Reduction meter.  Pushed out, the meter gives you the level  of the gain reduction.  Pushed in, the meter gives you the  level of the signal after compression; the output level.  Bypass      If the BYPASS button is not pushed in, the COMP16 is  processing the signal (compressing).  When pu
                    
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                        PRESONUS    Input  The input jack accepts balanced/unbalanced tip-sleeve or  tip-ring-sleeve connectors or XLR connectors.  The input  can handle up to +22dBu unbalanced levels.  Output  The output jack accepts (balanced/unbalanced) tip-sleeve,  tip-ring-sleeve or XLR connectors.  The output will deliver  up to +22dBu in signal level unbalanced.    2 . 3 PRESETS    Vocal  1  SOFT - Easy compression.  A low ratio setting for ballads  allowing a wider dynamic range.  Good for ‘live’ use.  This set
                    
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                        PRESONUS  -3.3dB 2.8:1 0.002mS 38mS    3  SCREAMER - For loud vocals.  Fairly hard compression for a  vocalist who is ‘on’ and ‘off’ the microphone a lot.  It puts the voice  ‘in your face’.  Threshold Ratio Attack Release  -1.1dB 3.8:1 0.002mS 38mS      Perc.   1  SNARE/KICK - Allows the first transient through and  compresses the rest of the signal giving a hard snap up front with a  longer release.  Threshold Ratio Attack Release  -2.1dB 3.5:1 78mS 300mS    2  L/R (Mono) OVERHEAD - A low rati
                    
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                        PRESONUS  Threshold Ratio Attack Release  -4.4dB 2.6:1 45.7mS 189mS    2  ACOUSTIC GUITAR - This setting accentuates the attack of  the acoustic guitar and helps maintain an even signal level keeping  the acoustic guitar from disappearing in the track.  Threshold Ratio Attack Release  -6.3dB 3.4:1 188mS 400mS    3  ELECTRIC GUITAR - A setting for ‘crunch’ electric rhythm  guitar.  A slow attack helps get the electric rhythm guitar up close  and personal and gives punch to your crunch.  Threshold
                    
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                        PRESONUS  3  ORCHESTRAL - Use this setting for string ‘pads’ and other  types of synthesized orchestra parts.  It will decrease the overall  dynamic range for easier placement in the mix.  Threshold Ratio Attack Release  3.3dB 2.5:1 1.8mS 50mS     Limit    1  MONO LIMITER - Just as the name implies.  A hard limiter  setting (brick wall) ideal for controlling level to the 2 track mixdown  deck or Mono output.  Threshold Ratio Attack Release  5.5dB 7.1:1 0.001mS 98mS       2  CONTOUR - A contoured
                    
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                        PRESONUS  2  PUMP - Make the COMP16 ‘pump up the prime’.  A setting for  making the compressor pump in a desirable way.  This effect is  good for snare drum to increase the length of the transient by  bringing the signal up after the initial spike.  Very contemporary.   Threshold Ratio Attack Release  0dB 1.9:1 1mS 0.001mS    3 Tamer – Tame that funky low end. Designed to help control low  end transients. This setting is especially useful for Bass Guitar.   Threshold Ratio Attack Release  -8dB 2
                    
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                        PRESONUS  2 . 4 APPL I C ATI O N GUI D E  QUI C K START    1.  Connect your COMP16 using one input jack (TS, TRS, or  XLR) and one or more of the output jacks(TS, TRS, or  XLR).  2.  Select your preset. (Refer to the preset descriptions above.  Remember that the Ratio, Attack and Release knobs are  only active in Manual mode.)  3.  Do not push the bypass button in.  4.  Turn the Input knob all the way to -20 (counter-clockwise).  5.  Set the Output knob on 0.  6.  Slowly turn the Input knob up (
                    
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                        PRESONUS   BASI C CONNECTI O NS    The COMP16 can be hooked to another processor, such as the  EQ3B or TubePre in a live or studio environment. Please note that  a microphone can not be plugged directly into the COMP16. The  microphone has to be preamplified first. The TubePre would be a  perfect preamp in front of the COMP16. We do recommend that  whenever possible, balanced cables be used. Examples of  balanced cables would be XLR or TRS (Tip – Ring – Sleeve). A  balanced cable is preferred be
                    
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                        PRESONUS   BASIC OPERATING PROCEDURES    Setting Compression Amount  Your COMP16 was designed with a fixed threshold mode of  operation.  This differs from other compressors in the fact that  there is no threshold control.  This offers the unique ability to  immediately hear the sometimes subtle differences between  presets which each have unique threshold settings.  In setting the  compression amount, always begin with the Input control all the  way counter-clockwise (-20dB), and slowly increas
                    
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                        PRESONUS  3 . 1  EQ3 B FRONT PANEL BASI C L A Y O UT    The front panel on the EQ3B is divided into three sections. These  are the three bands of equalization:       There is a frequency selection knob (Hz), gain/gain reduction(dB)  (amplitude) knob and a Q control. The frequency selection knob  (Hz) allows the user to choose the center frequency of that band of  the EQ. The Q knob allows the user to alter the width of the  frequency being adjusted. Q is defined as the ratio of the center  frequ
                    
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                        PRESONUS  Figure1      Bypass      If the BYPASS button is not pushed in, the EQ3B is  processing the signal (equalizing).  Pushed in, the EQ3B is  no longer equalizing the signal.  80Hz   The 80Hz button is a low end roll off filter. When pushed in,  the 80Hz button causes all frequencies below 80Hz to be   attenuated (dropped) by 12dB. This filter can be handy in  several live and studio applications. One instance would be  for use on a vocal. The 80Hz filter would help reduce the  “boominess”