mode. Remember, the
TRANSFORMER
CHANNEL B INPUTS
AND SENSITIVITY
CONTROL ARE DEFEATED
RANSFORMER
CONNECT LOAD BETWEEN RED BINDING POSTS 7OVIlOOV LINE
| |
0 | PATCH PANEL (BRIDGE MODE) WITH JUMPERS |
INPUT SENSITIVITY CONTROLS
The input sensitivity rating of a power amplifier is ,he RMS voltage level required at the input to produce
CS 1200X sensitivity controls are calibrated in decibel volts values rather than RMS voltage (usually listed in typical mixer specs), and as such are more useful, since most contemporary mixers employ LED arrays to indicate mixer output levels and are calibrated in decibel volts.
Knowing the power amplifier sensitivity rating in decibel volts will allow the mixer operator to know the status of the power amplifier by noting which LED on the mixer is peaking. Obviously, the LED labeled the same or closest to the sensitivity rating of the power amplifier will indicate full power output of the system. Operation at levels above this rating will cause the power ampli- fier to clip (produce distortion) unless the associated amplifier has a compressor/limiter to mini- mize this distortion. Such a system, called DDT (U.S. Patent #4,3 l&053), is included in the CS 1200X, and the advantages should be obvious. Without DDT, the sound engineer must “ride gain” on the mixer or employ an outboard limiter in order to prevent amp clipping. With DDT the sound man can relax more and enjoy the “ride.” For maximum mixer headroom (which in
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