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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.