GROUND CONNECTIONS
Connect the black wire from The Punch to ground at the
dashboard, firewall, or car body where the power amplifier is
mounted.
NOTE: It is extremely important to connect the ground in the
above manner or ground loops will result in noise pickup.
SPEAKER CONNECTIONS
For wiring to 4 ohm woofers, use
18 gauge wire
if less than 6
feet, Use
16 gauge wire
if longer than 6 feet. Use 18 gauge wire
to tweeters.
Observe polarity so each channel is in phase. Do not ground
speaker wires to car body because ground loop will result in
noise pickup and unstable operation.
WARNING! Do not put less than 3 ohm speaker load on each
channel.
SIGNAL SOURCE CONNECTIONS
For flexibility of installation The Punch has the ability to accept
either high or low impedance inputs. In order to obtain top
performance, high impedance inputs should be used.
HIGH IMPEDANCE INPUT
Using high impedance inputs from the tape/radio unit to The
Punch results in optimum performance in terms of low distor-
tion, wide frequency response, and signal to noise ratio. Units
that do not have high impedance line level outputs may be
modified. See “Modification Instructions For High Impedance
Output Jacks” (p. 5).
NOTE:
A very small percentage of auto radios may oscillate
with no load across their speaker terminals. This usually
sounds like a low frequency “tone” even when the radio volume
control is down. In these cases, install a load resistor across the
speaker output terminals, A 10 ohm 5 watt resistor should be
satisfactory.
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