Peavey CS 1000X User Manual

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For optimum performance and reliability DO NOT PRESENT THE AMPLIFIER WITH A SPEAKER LOAD OF LESS THAN 2 OHMS, OR A COMBINATION OF SPEAKERS THAT TOGETHER ARE LESS THAN 2 OHMS!

Using one speaker, it must be rated at 2 ohms minimum. Using two speakers, they must be rated each at 4 ohms minimum.

Using three speakers, they must be rated each at 8 ohms minimum.

WARNING!

The world-famous

CS@

1000X. This upgraded model provides impressive

C!F

1000 power amplifier has been changed to the new, extended-performance

2-ohm

output power capability while still maintaining the current 4- and &ohm ratings, and meets rigid industry standards for power bandwidth, slew rate, and distortion specifications.

The new extended specs are:

525 W RMS into 4 ohms / 750 W RMS into 2 ohms (per channel)

1050 W RMS into 8 ohms / 1500 W RMS into 4 ohms (bridged)

DDTTM

compression with LED indicators and defeat switch Slew Rate: 40 V/microsecond, stereo mode, each channel Power Bandwidth: 10 Hz to 50 kHz @ 4 ohms, rated power Total Harmonic Distortion: less than

0.03%,

rated power

Hum and Noise: 100 dB below rated power, unweighted

All the current features of the previous units have been retained, including Peavey’s patented

DDTTM

compression system and the very flexible back-panel patching capabilities. The two-speed fan cooling system has been improved to automatically provide additional cooling for the two-ohm load conditions.

FEATURES

. . . . . . . . .

Automatic two-speed fan cooling system/tunnel Independent channel thermal/fault protection Transient-free turn-on/off operation (relay) Two “back-porch” crossover “island” sockets for plug-in modules Two “back-porch” balanced-input transformer sockets for PL-2’s Single XLR and dual phone plug inputs each channel XLR input can be transformer-balanced Dual phone plug and 5-way binding post outputs each channel High temperature shutdown LED each channel

DDTTM

activation LED each channel Ten-segment, tri-colored power level LED array each channel

Calibrated/detented input attenuator control each channel

Rear panel

DDT

defeat and bridge mode select slide switches

DDTTM

The

ACTIVE

DDTTM

active

LEDs

(1)

indicate when compression is taking place. As long as gain reduction is occurring, the LED will continue to light, thereby giving a valuable indication of this unique compression function. The DDT function can be defeated on both channels simultaneously by selecting the defeat position on the DDT compression switch (7) located on the back panel of the CS 1000X. When the compressor is defeated, the DDT active LED will indicate clipping, this being the condition where the amp is failing to faithfully reproduce the input signal. A more thorough discussion of the DDT function is included later in this manual.

HIGH TEMPERATURE

LEDs

(2)

These LEDs illuminate whenever the thermal logic system has determined that a particular channel is operating above safe temperature limits and has shut down the unsafe channel. When this LED is illuminated, the CS 1000X if either or both channels are continuously operated into less than

“0”

LED will also go out on that channel. Excessive temperature conditions can occur in the

2-ohm

loads (or a short circuit), or if the ambient temperature of the air supply becomes too hot to provide adequate cooling even under normal

2-ohm

or greater loading situations. Since the CS 1000X is a “redundant” amplifier, the shutdown of one channel will not affect the operation of the other channel. When the unsafe channel has cooled down to safe limits, operation will be restored in that channel. Normal operation is indicated when the high temperature LED is off and the

“0”

LED is on. Continued operation under fault conditions will not harm the amplifier, but because of the nuisance factor, steps should be taken to determine the problem and solve it.

LED ARRAYS (3)

The CS 1000X has a tri-colored LED array on each channel to indicate the output power level. The LED array is calibrated in two different ways to offer maximum flexibility and ease of use. In the center of the LED ladder, the calibration is percent of full power output. The top LED, labeled

lOO%,

will flash when the CS 1000X has reached full RMS power output capability on that particular channel. Operation at power output levels below 100% will naturally be indicated by lower LED readings. The lowest value indicated is

0.4% of full power, which corresponds to 2.0 watts RMS output into 4 ohms. Operation below that power level will not be indicated, since the lowest LED is calibrated at 0% or standby. As mentioned, this LED should be illuminated whenever the amplifier is operating with AC mains power applied under zero signal

conditions. Next to each ladder the calibration is indicates the amount of power amp headroom left for any signal condition.

INPUT SENSITIVITY CONTROLS (4)

The CS 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.

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 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 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.

1000X

“0”

features a 31 detent, calibrated sensitivity control for each channel. Each control is labeled to

indicator lights, then the possibility exists of an internal “fault.” If neither channel

“dB

below full power.” This is a convenient scale that

“0”

array

LEDs

“0”

after

GRILLE (6)

The back panel includes the fan opening with protective grille 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 speakers to be damaged.

1000X,

and defeating this valuable limit can eventually cause the

(6)

where cooling air is drawn into the

i’

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

The CS 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.

1000X

is fitted with a single heavy-duty

#14

AWG 3 conductor line cord and a conventional AC

Never break off the ground pin on the CS 1000X or any amplifier. The use of extension cords should be avoided, but if essential, always use a three-wire type with at least a wire will severely limit the power capability of this amplifier. Always use a qualified electrician to install

any necessary electrical equipment. To prevent the risk of shock or fire hazard, always be sure that the amplifier is properly grounded.

CIRCUIT BREAKER (9)

The new CS 1000X now features a circuit breaker in place of the mains fuse. This breaker is provided to

limit the mains current to the associated power transformer, thereby protecting it from overheating and possible destruction due to any fault conditions in the amplifier. The trip current value has been carefully chosen to allow continuous power output performance, while still providing adequate protection for the power transformer itself. Normally the breaker should not trip; however, abnormal conditions such as a

short circuit on either or both channels, or continuous operation at overload or clipping, especially into a

2-ohm

the overload. When tripped, the button on the breaker will be extended outward nearly l/2” and can be reset by pushing inward. A normal reset button length is about l/4”.

simply pushing the button back in will reset it, after waiting a brief period of time to allow it to cool down. If the breaker trips instantly each time you attempt to reset it, then the unit should be taken to a qualified

service center for repair.

The back panel of the CS 1000X features a unique “back-porch” design containing the various input and

output connectors for each channel. A patch panel is also included, providing a very flexible system for use

with balanced-input transformers and dual crossover networks. These features are unduplicated in any other

stereo power amplifier on the market today.

load, will cause the breaker to trip. If this occurs, simply reset the breaker and correct the cause of

#14

AWG wire size. The use of lighter

If this “thermal”-type breaker does trip,

MODE SWITCH (10)

The mode switch is located on the “back-porch” next to the channel input jacks. This switch converts the

CS 1000X from normal stereo mode to bridge mode. Bridge-mode operation is very popular for commercial

sound distribution systems

WARNING: In bridge mode, the CS 1000X is capable of delivering 1000 W RMS into 8 ohms and

1500 W RMS into 4 ohms. Always be very certain that the associated loudspeaker system can handle this

power level reliably. Also, be advised that in most crossover applications, accidental switching to the bridge mode could destroy the speaker system. Specific applications of the bridge mode will be covered later in this manual.

(70/100

volt lines).

+ 14 hidden pages