CONNECTING SPEAKERS:
STEREO MODE
Along with standard 1/4” phone jacks there
are binding posts located within a box on the
rear panel labeled “SPEAKERS”.
BRIDGE MONO MODE
This power amplifier can be converted
from stereo to mono, providing twice the
power capacity of a single channel, by
switching into BRIDGE MONO mode and
connecting the speakers to the two RED
binding posts.
When the rear panel switch labeled BRIDGE is set to its ‘out’ position, the amplifier is con-
figured for normal STEREO operation.
When the rear panel switch labeled BRIDGE is set to its ‘in’ position, the amplifier is setup
for BRIDGE MONO operation. This causes channel 2’s outputs to be “out of phase” from
channel 1’s. In this configuration a single set of speakers is connected with one lead going to
channel 1’s RED binding post and the other lead going to channel 2’s RED binding post.
(See the “Typical Bridge Mono Triamp” illustration on page 6.)
When ‘bridging’ an amp, the impedance capacity is always reduced in half. For example;
since the F150’s outputs are rated for a minimum of 4
Ω
per channel, the lowest impedance
allowed in bridge mode is 8
Ω
. (Note: Operating the amplifier with loads below the rated
minimum will cause premature distortion.)
EQ EXPAND SWITCH
This switch, when set to its ‘in’ position will boost the highs and lows by +4dB at 80Hz and
12kHz. This works well as a loudness contour when operating at low volume levels or adds
flavor when using it in a bass or guitar rack. When set to the ‘out’ position it provides a flat
output response. Try it both ways and set as desired.
1
2
–
MONO
BRIDGE
SPEAKERS
8 OHMS
MIN.
STEREO
MONO
1
2
–
MONO
BRIDGE
BRIDGE
SPEAKERS
8 OHMS
MIN.
POWER
1
2
3
4
5
6
7
8
9
10
11
12
13
15
17
19
22
30
50
0 dB
CH 1
1
2
3
4
5
6
7
8
9
10
11
12
13
15
17
19
22
30
50
0 dB
CH 2
OUT
IN
O
F
F
O
N
EQ EXPAND
POWER-UP SEQUENCE
Follow these simple steps when applying power to the system.
1. Verify all system connections while power is still off.
2. Lower all power amplifier level controls to minimum.
3. Apply power to the mixers, processors etc. first.
4. Apply power to the power amplifiers last.
5. Setup mixer, processors etc. to nominal operating levels.
6. Set power amplifier level controls to desired volume.
Note: Reverse this procedure for power-down.
11
One or both clip LED’s
flash intermittently
cont’d
Sound is distorted and
clip indicator(s) are on
Sound is distorted and
clip indicator(s) are not
on or only flash occa-
sionally
One or both channels
distort or cut out every
few minutes
Sound is coming from
both channels when only
one channel has signal
at its input
Shorted speaker or speak-
er cable
Too many speakers
Amplifier input signal is too
high
Unit entering PROTECT
mode due to overheating
Rear panel “BRIDGE”
switch is in the mono posi-
tion
the sound is not distorted.
Running the system with
the LED’s continuously lit
will not harm the power
amp but is dangerous to
speakers whose power
ratings are not well above
the amplifier’s power rat-
ing.
Try different cables and
speakers
Try connecting one speak-
er system at a time.
Turn down the output level
of equipment feeding the
amplifier. If the sound
level is too low then raise
the controls on the front of
the power amp.
Make sure both the front
and rear of the amplifier
has adequate space for
ventilation.
Verify that the total speak-
er load is not less than 4
Ω
(i.e., three 8
Ω
speakers
per channel is less than
4
Ω
total.)
Check for shorted speaker
cables.
Move “BRIDGE MONO”
switch to the Stereo posi-
tion.
Correction
Problem
Possible Cause
TECHNICAL ASSISTANCE
If the above chart has not been able to guide you to the problem then answer the follow-
ing five questions:
1. AC cord attached to a source ‘alive’ with appropriate Voltage and current capacity?
2. Is the fuse OK and power switched on?
3. Correct level audio signal connected to inputs through known good cables?
4. Are the switches set properly and level controls raised sufficiently?
5. Are known good speakers connected properly using known good cables?
Carvin’s friendly technical support staff will be happy to assist by calling 800-854-2235.
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