Crown CE 2000, Reference Manual

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Page 30
CE-Series Amps with an Attitude!
Input Sensitivity:
A two-position Input Sensitivity switch is lo-
cated on the back panel near the input connectors. Your am-
plifier is shipped from the factory with this switch set to the
1.4-V position. At this setting, a 1.4-volt input signal will drive
the amplifier to full power into an 8-ohm load when the level
controls are turned to maximum. The input sensitivity can also
be set to a fixed voltage gain of 26 dB.
The input sensitivity setting is a function of amplifier gain. You
will want to match this setting with the output capability of the
mixer or equipment sending the drive signal to the amplifier.
The 1.4-V position corresponds to a +4 dBu level. This is the
level that most professional gear operates at. The 26-dB posi-
tion is a fixed gain position, meaning the amplifier provides a
fixed voltage gain of 20 (or 26 dB: 1 volt in, 20 volts out). This
position works best with output levels of +10 dBu (2.5 volts
RMS) or more. Some brands of DJ mixers, in particular, have
output levels in this range. Selecting the correct sensitivity will
allow your equipment to operate at its optimum level and im-
prove the signal-to-noise of the system.
Mode:
Bridge-Mono Mode combines the two amplifier output
channels into a single mono channel with twice the voltage of
a single stereo channel. This means the output will be much
more powerful! It does this by bridging the outputs, and it re-
quires special output wiring.
Do NOT use the negative (1–,
2–) outputs when the Bridge-Mono Mode is selected. Con-
necting anything to the negative terminals may result in a visit
by the Polarity Police (see Section 2 for more information).
When Bridge-Mono Mode is selected, only the Channel 1 level
control and the Channel 1 signal LED will work. If the Channel
2 input is wired, the Channel 2 level control should be turned
to “
∞
” (counter/anti-clockwise) to prevent distortion.