connectors not used; channel A and B chassis ground wires are not uses (plugged into isolated floating terminals)! This wiring requires one jumper per channel for a total of two; the other two are stored! Again, a wiring diagram is included and check it carefully before you proceed!
THE Sl OUTPUT
MODULE REAR VIEW
BI-AMP MODE (21)
(Option 4) The final wiring arrangement is really a natural progression of the SPEAKON capability with it’s four wire connections. Bi-amping is really the preferred configuration for most sound reinforcement systems. It will be discussed later in this manual. The SPEAKON pins used in the typical bi- amped loudspeaker enclosure are: 1 t = LOW+;
1 - = LOW-; 2t = HI+; 2 - = HI-. With the above wiring arrangement, two bi-amped, wired loudspeaker enclosures can be connected to a CS 800s via the two SPEAKON connectors. First, the CS 800s must be configured for bi-amp mode with each channel signal supplied from a suitable crossover, and in this case the configuration is channel A is the “lows” and channel B is the “highs”. For this one, the wiring is: 1 t on both connectors wired to channel A signal output; 1 - on both connectors wired to channel A chassis ground wire; 2t on both connectors wired to channel B signal output; 2 - on both connectors wired to channel B chassis ground wire. This configuration also requires two jumpers per channel for a total of four. Again, check the wiring of the module carefully!
INSTALLATION AND CONNECTION
The Peavey CS 800s commercial series power amplifier is designed for durability in commercial installations and the quality of performance required in studio and home applications. The unit is a standard rack-mount configuration, 3 l/2” high and is cooled by two variable speed internal fans. All the input and output connections are on the back panel. The front panel contains LED indicators for power & DDT activation, detented/calibrated sensitivity controls, and a mains power switch.
INDUSTRIAL AND COMMERCIAL INSTALLATIONS
For commercial and other such installations where sustained high powered operation is required, the CS 800s should be mounted in a standard EIA 19” rack. It is not necessary to leave rack space between each amplifier in the stack, since the fan pulls air in from the rear and exhausts the hot air out the front. An adequate source of cool air must be provided for the amplifier when rack-mounted. The internal fans must have a source of air that is not preheated by other equipment. If cool, the amplifier will start up in low-speed fan operation, and will normally stay at low-speed operation unless sustained high power operating levels occur. As the amplifier heat sinks heat up the automatic thermal sensing circuitry will increase the fan speed. Depending upon signal conditions and amp loading, the fan speed may increase to a maximum value, or it may decrease to a minimum value. This situation is quite normal.
Inadequate cooling due to preheated air, a reduction of air flow caused by blockage of the amplifiers inlet/outlet ports, or severly overloading the amp may cause the amplifiers thermal sensing system to temporary shut down that particular channel. This will be indicated by the channel power LED on the front panel ceasing to illuminate. Depending upon available cooling air, operation will be restored to that channel relatively quickly, and the power LED will then be illuminated. Corrective action should be taken to determine the cause of the thermal shutdown. If the amplifier is not severely overloaded or shorted, and air flow is normal in and out of the unit, steps should be taken to provide a cooler environment for all the amplifiers. As a general rule, the cooler electronic equipment is operated, the longer its useful service life.
STUDIO AND HOME INSTALLATION:
In most low-to medium-power applications, the CS 800s can be mounted in any configuration. It is desirable that, if at all possible, the unit be located at the top of an equipment stack. This will prevent possible overheating of any sensitive equipment by the hot air rising from the power amplifier. As a general rule, most home and studio requirements will never cause maximum high speed fan operation. If it does however, this may indicate that you have not taken the necessary steps to provide adequate cooling. Remember, closed up in a cabinet, the CS 800s will have severe cooling problems, even at low power levels. Again, inadvertent short circuit or sustained overloaded usage could also cause temporary thermal shutdown. Most home wiring and electrical circuits are only 15 amps. Two CS 800s amplifiers could cause a power panel 15 amp circuit breaker to trip if a severe overload occurs.
