User manual PRESONUS COMP16 V2.0

[. . . ] COMP16 SMART COMPRESSOR HP4 HEADPHONE DISTRIBUTION AMPLIFIER EQ3B 3 BAND PARAMETRIC EQALIZER USERS MANUAL Version 2. 0 PreSonus Audio Electronics 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. 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. [. . . ] If the EQ3B does not work immediately, you may want to try changing the jacks that are plugged into the input and output of the unit. 15 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 increase the input until the Gain Reduction meters begin to register the compression activity. The more you crank up the Input the more compression your signal will experience. Always pay close attention to the best judge of your sound, your ear. You should also frequently remove the compression from the signal using the Bypass button to listen to the changes in your sound. In modern recording practice, it is customary to adjust the Output control such that the Input and Output level are of equal amounts according to the Output/Gain Reduction meter. This gives you an equal level output so that you can switch processing in and out to compare difference. PRESONUS 3. 1 EQ3B FRONT PANEL BASIC LAYOUT 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 frequency divided by bandwidth. An example of how the width looks can be seen below in Figure 1. An example of use of high Q would be a "Notch Filter". A Notch Filter is used to remove a small frequency range that may be annoying or unwanted. An example of wide width or low Q would be a bell. An example of using a bell would be a low end roll off. Let's say that a person is performing live and the low end is too overpowering. The engineer or sound person could set the Q at 0. 1, frequency at 80Hz and the gain reduction to -12. This would enable that person to lower a wide frequency range fairly quickly. The Gain/Gain Reduction knob (dB) allows the user to raise or lower the amplitude (peak) of the chosen frequency. 17 PRESONUS Figure1 Bypass If the BYPASS button is not pushed in, the EQ3B is processing the signal (equalizing). [. . . ] 10kOhms XLR Output Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Ohms TRS Output Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Ohms THD + Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0. 002% Internal Operating Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]