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conditions. Next to each ladder the calibration is
“dB
below full power.” This is a convenient scale that
indicates the amount of power amp headroom left for any signal condition.
INPUT SENSITIVITY CONTROLS (4)
The CS
1000X
features a 31 detent, calibrated sensitivity control for each channel. Each control is labeled to
show the actual input sensitivity ratings of the amplifier for various settings in decibel volts necessary to
attain the full-output power rating. Thus, maximum input gain (minimum sensitivity rating) is achieved at
the full clockwise setting, and this setting yields maximum mixer/system headroom. A setting of less than
full clockwise will yield lower system noise at the expense of mixer/system headroom. A more thorough
discussion of input sensitivity follows later in this manual.
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MAINS POWER SWITCH (5)
The front panel of the CS 1000X contains a conventional on/off rocker switch. When the amplifier is
plugged into a suitable power source, activating this switch should light both channel
“0”
array
LEDs
after
the power-up delay sequence is completed (approximately two seconds). You should also be able to hear
the output relays close (click). If the amplifier is cool, the fan should start on low-speed operation. If only
one channel
“0”
indicator lights, then the possibility exists of an internal “fault.” If neither channel
“0”
indicator lights, check the rear panel circuit breaker and the mains power source. It’s always a good idea to
check to see that the cooling fan is operational, especially on a new unit. The possibility exists that due to
shipping and handling, the fan bearings may be too tight to allow low-speed fan operation. If this is the case,
immediately seek professional help. The CS 1000X must have normal fan operation to provide adequate
cooling for the unit. Without air flow, the amplifier will “thermal” very quickly under any signal conditions.
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i’
GRILLE (6)
The back panel includes the fan opening with protective grille
(6)
where cooling air is drawn into the
amplifier. This opening should never be blocked or restricted.
DDT SWITCH (7)
This switch is used to either ENABLE or DEFEAT the DDT compressor. Defeating the DDT compressor
should not be performed lightly or simply as a matter of course. Most loudspeaker systems simply cannot
handle the square wave power of the CS
1000X,
and defeating this valuable limit can eventually cause the
speakers to be damaged.
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MAINS POWER SOURCE (120V products only) (8)
The CS
1000X
is fitted with a single heavy-duty
#14
AWG 3 conductor line cord and a conventional AC
plug with a ground pin. It should be connected to an independent mains circuit capable of delivering at least
15 AMPS continuously. This is particularly critical for sustained high-power applications. If the socket does
not have a ground pin, a suitable ground lift adaptor should be used, and the third wire grounded properly.
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