nels, synthesizers, and other unbalanced signal sources.
Microphones and guitars can be used with the level switch set to
-10dBV (see below). Guitars with exceptionally low output pickups may require a preamp for best results. The input impedance is greater than 100kΩ.
Side chain This stereo jack allows for insertion of other signal proces- sors or "keying" from other signal sources. See section 1.8 for side chain applications.
Output Provides the processed (compressed/limited/gated) output. The output impedance is 470Ω, unbalanced. Output level covers a nominal -20 to +20 dB range.
+4 dBu or -10dBV switch Use this switch to match each channel of the 3630 to the rest of your gear. Generally equipment designed for larger pro studios tend to use +4 dBu nominal signal levels. Equipment de- signed for smaller project and home studios and electronic musical in- struments tend to use -10dBV nominal signal levels. If the input signal doesn't provide enough drive to the LED meters, use the -10dBV posi- tion. If distortion occurs, use the +4 dBu position.
Changing the switch position modifies the way the input/output meter references signals. When set to the +4 dBu position, a 4 dBu input sig- nal reads 0 dB on the input/output meter. When set to the -10dBV po- sition, a -10dBV input signal reads 0 dB on the input/output meter. When the unit is set up for unity gain (no compression, output at 0) the input level will be equal to the output level regardless of the position of the +4 dBu/-10 dBV switch.
Installation
For most applications the 3630 will be installed in a rack frame. The 3630 generates very little heat so it is not necessary to leave an empty space for ventilation above or below the unit.
