Radio Shack 85 Using the Frequency Crossover, Over Freq On/Off Switch, Over Freq Control

12-1977.fm Page 24 Tuesday, July 13, 1999 10:07 AM

2.Temporarily turn up the autosound system’s volume control to about one- third of its full range.

Caution: Never turn the level controls up any farther than you need to get clear sound at two thirds volume maximum.

3.Turn the left and right LEVEL controls clockwise until you can hear the sound at a comfortable level.

4.Turn up the volume on your autosound system until the sound begins to dis- tort. Then immediately turn down the volume to the point just below where distortion began.

5.Adjust the level controls until the volume is at the maximum level you want the autosound system to produce.

6.Adjust the autosound system’s volume control to a comfortable listening level.

USING THE FREQUENCY CROSSOVER

X-OVER FREQ On/Off Switch

To use the amplifier’s crossover function with a subwoofer, push in X-OVER FREQ to On. To use the amplifier without a subwoofer, push and release X-OVER FREQ to Off.

X-OVER FREQ Control

When you push in X-OVER FREQ to On, the X-OVER FREQ 45 Hz/400 Hz lets you adjust the crossover frequency from 45 Hz to 400 Hz for Channels 3 and 4 so you can adjust the sound to compensate for your vehicle’s acoustics.

Note: Since this only controls the 45–400 Hz frequencies, this control is useful only for subwoofers and not your main speak- ers.

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