Peavey CS-400 User Manual

interference cancellation. When conditions require the use ot a balanced input at the amplifier, the XLR connectors (5) on either or both channels
can be converted to a balanced configuration by removing the jumpers supplied, and plugging an input transformer module (PL-2 ™ ) into the
transformer accessory socket (6). The Peavey Model PL-2 ™ transformer module is a nominal 600 to 600 ohm type, resulting in unity gain. As
indicated by Diagram 2, the XLR connector is now wired as a standard balanced type input (Pin 1 is ground, pin 2 is negative, pin 3 is positive.) The
parallel input jacks (7) previously discussed are connected after the transformer and can be used to patch to other inputs, including the other
channel of this amplifier if desired.
When balanced stereo operation is desired, two PL-2 ™ modules are required. However, for monaural operation (the same signal is applied to
both channels), only one PL-2 ™ is needed. A shielded jumper cable is then connected between one of the Channel A input jacks (11) to one of the
Channel B input jacks (11). The XLR connector on the channel with the transformer module is balanced. The other channel XLR connector should
not be used.
If desired, the Peavey CS-400 ™ patch panel can be used to provide stereo bi-amplification operation. Electronic crossover modules for 500 Hz
(PL-6 ™ ) and 750 Hz (PL-7 ™ ) are available; an SP-1 ™ crossover is also available (PL-8 ™ ), providing special equalization for this unique speaker
system. Additional plug-in modules will become available in the future for other specialized systems.
BI-AMPING
There are many good reasons for using a bi-amplified professional system as opposed to a system with traditional high-level crossovers. One
reason is that a bi-amplified system can actually provide more headroom with the same power amplifier complement than a system using high-level
passive crossovers. This term "headroom” deserves some consideration. Program material (music or speech) is made up of many different
frequencies and their harmonics. Most music, especially popular music, is bass heavy; that is, the low frequency material contains much more
energy than the high frequency material. When both high and low frequency material, such as a voice and a bass guitar, are present in a program,
the high-energy bass frequencies can "use up" most of the power available from the power amplifier leaving little power for the high frequencies.
The result can be severe clipping (distortion) of the high frequency material. In the bi-amplified system, the high frequency material can be routed to
its own power amplifier, which minimizes the clipping problem. This results in an effective increase in headroom that is greater than would be
obtained by simply using a single larger power amplifier.
CS-400 PATCH PANEL (STEREO MODE)
WITH CROSSOVER AND INPUT TRANSFORMER MODULES
PL - 6, 7 or 8
LOW Z INPUT
X—OVER
INPUT
OUTPUTS
LOW HIGH
CHANNEL
INPUT
STEREO BRIDGE

Peavey CS-400 Specifications

General

Minimum Load Impedance (Stereo)	4 ohms
Input Impedance	20 kOhms
Frequency Response	20 Hz to 20 kHz
Total Harmonic Distortion	Less than 0.1%
Input Sensitivity	1.0V RMS for rated output
Signal to Noise Ratio	>100dB
Power Output	200 Watts RMS per channel at 4 Ohms