5
AC POWER SWITCH(1)
Pressing the CS 6000/ CS 4000 power switch will alternately turn the amplifier on or off. Once the amplifier has completed its power
on sequence, the switch will light indicating it is on and operational.
INDICATORS
The CS 6000/ CS 4000 amplifier features signal and DDT indication for each channel along with amplifier power and thermal protec-
tion indicators.
THERMAL PROTECT LED (2)
If the amplifier temperature rises above its normal operating range, thermal protection circuitry reduces the output power on that
channel until it is safe to return to normal operation. If this happens repeatedly, either reduce the load on the amplifier (detach
one of the speakers), or supply additional cooling to the amplifier, such as a fan. When rack mounting, it is helpful to leave 1 RU
open above and below the amplifier to prevent heat buildup from adjacent units.
Signal Present and DDT (DISTORTION DETECTION TECHNIQUE) LED (3)
The channel LED will light green when a signal is present and red at the onset of clipping. If the LEDs are flashing red
quickly and intermittently, the channel is just at the clip threshold. A steady, bright red glow means the amp is clip limiting,
or reducing gain to prevent severely clipped waveforms from reaching the loudspeakers. See the Distortion Detection Tech-
nique section for more information.
INPUT ATTENUATORS (4)
Whenever possible, set the attenuators fully clockwise to maintain optimum system headroom. The input attenuator controls, located
at the front panel (one for channel A, one for channel B), adjust gain for their respective amplifier channels stereo mode. In bridged
mono mode, only the channel A attenuator is active. See the specifications at the end of this manual for standard voltage gain and
input sensitivity information.
Front Panel
When operating in Bridged
Mono mode, the channel A
attentuator controls the output.
The channel B attenuator is
inoperative..
See the section on Bridged Mono
operation for more information
and precautions.
OVERLOAD
CHANNEL A
LEVEL
(dB)
0
6
16
20
23
26
29
+32
OVERLOAD
LEVEL
(dB)
0
6
16
20
23
26
29
+32
CHANNEL B
CS 6000
INPUTS
CHANNEL A
CHANNEL A
CHANNEL B
BREAKER
20A 250V
BREAKER
20A 250V
CHANNEL B
LINE OUTS
BRIDGE
DDT
TM
ENABLE
DEFEAT
BRIDGE
SPEAKER OUTPUTS
CLASS 3 WIRING
BRIDGE
+
+
+
_
_
_
A
B
+
-
+
-
GND
40 Hz
150 Hz
X-OVER
HIGH
OUT
LOW
OUT
THRU
40 Hz
150 Hz
X-OVER
HIGH
OUT
LOW
OUT
THRU
STEREO
BRIDGE
1
4
4
2
3
3
