Owner`s manual

Connecting a normal(one side of the output is actually connected to ground somewhere in the

system) radio to an equalizer or power amplifier is easy.

1. Somewhere near the radio, cut the wires short and splice them into a piece of shielded cable.

Run the cable to the equalizer or amplifier and terminate it in a compatible connector. Be sure

that the hot side of the radio output goes to the center wire of the shielded cable, and the ground

side of the radio output goes to the shield of the shielded cable. Do the same when you install the

plug at the other end.

2. Set the power amplifier or equalizer for minimum sensitivity (highest voltage required to drive

it).

3. Connect the speakers to the amplifier.

4. Turn on everything and adjust the radio’s volume until you can hear distortion. Back off the

volume control until the distortion goes away.

5. Adjust the power amplifier’s level control until the amplifier distorts, or the system gets too

loud. If you are using an equalizer, use the equalizer’s input level control for this adjustment,

then adjust the power amplifier input level control so that it is compatible with the equalizer

output.

6. What you are trying to do is set the gain controls so that the radio’s amplifier clips at nearly the

same time as the new external amplifier. If there is an equalizer in the system, then you adjust

the radio till it barely distorts, and then adjust the equalizer’s input level control to make this

signal level palatable to the equalizer’s circuitry. Once you’ve done this, you can ignore the fact

that the radio has a power amplifier in it.

If the radio is a high-powered unit, then all you do is to use ONE of the two output leads (pick the

ones that would have gone to the hot terminals of the speakers) and the system ground (not auto

body) connection. Tape and insulate the other two wires. Now use the procedure above, beginning

at Step 2.

Minimizing Noise in Autosound Systems