All two-channel PCX™ amplifiers are capable of being bridged into a 4 ohm mono
output without switches or bridging modules. This feature permits the creation of
a mono channel for a subwoofer or center channel. Deriving the mono channel
is accomplished by using the Left Channel Positive wire ( L + ) as the positive speaker
wire and the Right Channel Negative wire (R-) as the negative speaker wire.
N O T E : It is important that a minimum 4 ohm impedance is observed. If the
impedance drops below 4 ohms while the amplifier is wired in the bridged
configuration, the amplifier's protection circuitry (AM-IV) may engage.
Run the speaker wires from the amplifier location through the vehicle to the
speakers. Observe the same precautions for routing these wires that you followed
for running the power and remote turn-on wires. Cut o ff excess and, using wire
strippers, strip 1/4 inch of insulation. Locate the speaker/remote turn-on
P o w e rL o c k c o n n e c t o r. Loosen the outer screws on the underside of the connector.
Insert the speaker leads into the end. Check to be sure you've maintained proper
polarity before securing each wire, and plug the PowerLock into the amplifier.
10
The Advanced Instrumentation Input has trickled down from the $15,000
PrecisionPower2500F1. This circuit completely isolates the chassis ground from
the audio circuit of the amplifier and reduces noise radiated into your signal cables
by up to 40dB. This is equivalent to a noise reduction of approximately one hundred
times what the noise level would be without this circuitry. It provides all the benefits
of a true 'balanced' line without the need of any special cables (see diagram
below). This type of input works with any conventional RCAcable.
There are two sets of RCA jacks on the front end of your amplifier. The RCA
cables from your source unit go in the set labeled INPUTS. If your source unit doesn't
have RCA outputs don't worry. Simply add a set of RCA plugs (available at your
dealer) to your front or rear set of speaker leads (see drawing below), plug them
into the input jacks, and push to the IN the -12dB input attenuation switch.
11
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