User manual MACKIE QUAD GATE

[. . . ] QUAD COMP/GATE 4-CHANNEL DIGITAL COMPRESSOR/GATE OWNER'S MANUAL QUAD-COMP/GATE Important Safety Instructions 1. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Do not defeat the safety purpose of the polarized or grounding-type plug. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. [. . . ] The markings around the RATIO knob show the compression ratio such as 10:1. The expander 2:1 and uses these same values as a refer ence, but the actual value are inverted, as 1:2, 1:10 and so on. For example, if such the knob is set to 5:1 from the marked scale, this is an actual downward expansion ratio of 1:5 (every 1 dB of signal below the threshold will yield 5 dB attenuation of the output). The ratio ranges from 1:1 (no gain reduction) to 1:20 (maximum gain reduction). Ignore the infinity:1 label, as this is just valid for the compressor. As the settings approach 1:1, the resolution between values increases, for finer control of smaller values. · · · 20. EXP button This backlit button changes the gate to a downward expander when lit. When engaged, the RANGE [24] knob is disabled and the RATIO [19] knob is enabled. The ATTACK [21], RELEASE [22], and HOLD [23] knobs operate the same as in gate mode. Signals that are lower than the threshold level are decreased in level by an amount determined by the setting of the RATIO knob. Once the GATE [16] button has been pressed, the knobs operate as described below. Note: The gate is still in operation (at its last settings) working its magic on the audio, even if the GATE button is not selected. 18. THRESHOLD knob In gate mode, this knob adjusts the level below which attenuation begins. The threshold level can be adjusted from ­60 dBu to +20 dBu (fully clockwise). Signals below the threshold are reduced in level by an amount set by the RANGE [24] knob (or RATIO [19] if EXP [20] is pressed in). ATTACK knob In gate mode, this knob adjusts the amount of time for the gate to open and pass the signal through, once the signals move above the threshold level (after reduction has occurred). Use this knob to adjust the Attack time from 0. 1 ms to 300 ms (fully clockwise). RELEASE knob In gate mode, this knob adjusts the amount of time for the gate to close and begin attenuation, after the signal drops below the threshold and the hold time has passed. Use this knob to adjust the Release time from 50 ms to 3 seconds (fully clockwise). 26. This allows you to quickly compare the action of the key filter on gating. When this button is out, the key filter knobs will have no effect on the gate. 23. HOLD knob This adjusts the amount of time the gate stays open for, after the signal drops below the threshold, and before attenuation begins. Use this knob to adjust the Hold time from 0 ms to 5 seconds (fully clockwise). 27. HP FREQ knob The gate key filter high-pass filter employs a 12 dB per octave Linkwitz-Riley design. [. . . ] Ship the product in its original shipping carton, freight prepaid to the authorized service center. The address of your closest authorized service center will be given to you by Technical Support. IMPORTANT: Make sure that the Service Request Number is plainly written on the shipping carton. LOUD Technologies reserves the right to inspect any products that may be the subject of any warranty claims before repair or replacement is carried out. [. . . ]