INPUT
PIN1: SIGNAL GND
PIN2:
PIN3: SIGNAL –
BRIDGE
PARALLEL
STEREO
50HZ
25HZ
5HZ
OFF
ON
OFF
ON
CH-1 BRIDGE IN
CH-2 BRIDGE IN
SERIAL NO.:
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
BRIDGE
CH-1 OUTPUT
POWER CABLE
FUSE
CH-2 OUTPUT
-
+
CH-1
+
-
+
-
CH-2
SAFETY
MARK
USA 020898-11
020898-11
ITEM NO. D030905
CALIFORNIA, UNITED STATES OF AMERICA
E-mail: [email protected]
w w w . N I S S I N D O U S A . c o m
ENGINEERED AND DESIGN IN U.S.A.
MODE
LF FILTER
CLIP LIMITER GROUND
4
LED INDICATORS
The LED indicators can be used to monitor system operation
and identify common problems.
BRIDGE:
Each channel pair has a YELLOW LED for BRIDGE
Mode. These show how the rear panel switches are set. In
Stereo mode, both LEDs should be OFF.
PEAK:
RED, under each BRIDGE LED. Each channel pair has
a RED LED for PEAK Mode.
Normal indication:
The PEAK indicator illuminates whenever the amplifier is
driven beyond full power. The resulting distortion corresponds
to the brightness of the LED. Distortion that causes only brief
flashing may not be audible.
• During muting, the LED fully illuminates. This occurs during
normal "On-Off" muting.
Abnormal indication:
• Bright RED illumination while the amp is being used
indicates either thermal muting or a shorted output.
• If the amplifier overheats, the fan will run at full speed,
and operation should resume within one minute. Allow the
fan to run, and make sure the amplifier ventilation is
adequate.
• A shorted or overloaded output circuit will cause excessive
PEAK flashing and possible overheating.
If distortion is audible without a PEAK indication, the problem
is either before or after the amplifier. Check for damaged
speakers or overloaded signal source. The amplifier Gain
control should be in the upper half of its range to prevent
input overload.
SIGNAL:
GREEN, under each PEAK LED. Each channel pair
has a GREEN LED for SIGNAL Mode.
Normal indication:
The SIGNAL indicator illuminates when the input SIGNAL
exceeds -35 dB, the -20dB indicator illuminates when the
signal exceeds -20dB, and the -10dB indicator illuminates
when the signal exceeds -10dB.
If no indication:
check Gain settings and increase gain if necessary. Check
input connections and audio source for signal. If the SINGAL
LED illuminates with little or no signal indication, check the
output wiring for shorts.
Abnormal indication:
If the SIGNAL, -20dB, or -10dB LED illuminates with no signal
input, there may be system oscillations or some other
malfunction. Disconnect the load and fully reduce the gain. If
the LED remains on, the amp may need servicing.
BRIDGE MONO MODE
What It Is
BRIDGE mono mode combines the power of both amp
channels into one speaker, resulting in twice the voltage
swing, four times the peak power, and approximately three
times the sustained power of a single channel. This mode uses
Channel 1's input, gain control, input filter, and PEAK limiter;
Channel 2's have no effect.
The BRIDGE LED on the front panel indicates when the amp is
in BRIDGE mono mode.
When To Use It (or Not)
Use BRIDGE mono to deliver the power of both channels to a
single 8 or 4 ohms load. Set switch position 7 to "BRIDGE
MONO ON." Use Channel 1's inputs, and connect the
speaker as shown.
Bridge-mono Precautions:
This mode puts a high demand on the amplifier and speaker,
Excessive clipping may cause protective muting or speaker
damage. Be sure the speaker has a sufficient power rating.
Output voltages greater than 100 volts rms are available
between the amplifier's BRIDGE terminals. NEC CLASS 3
wiring methods, as specified in accordance with national and
local codes, must be used to connect the speaker.
BRIDGE
PARALLEL
STEREO
50HZ
25HZ
5HZ
OFF
ON
OFF
ON
MODE
LF FILTER
CLIPLIMITER
GROUND
UPPER SPEAKON ONLY
TO SPEAKER
REFERENCE CONNECT
2–
1+
2+
16
8
4
+
-
1–
