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.
A 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.
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.
MAINS POWER SOURCE (120V products only) (8)
A 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.
