Adjustments

CROSSOVER FREQUENCY ADJUSTMENT

To avoid over-crowding the control panel, only four frequencies are shown on each frequency selector. In reality you can choose any of the frequencies between the lowest and the highest setting marked on the selectors.

•When setting the crossover frequencies, it is best to use compact discs or cassette tapes with greater dynamic range

•Center the tone, balance and fader controls of the source unit (leaving the other controls at their previous positions)

•Set the volume of the source unit to approximately 2⁄3 of its maximum output

CHANNEL “A” CROSSOVER FREQUENCY SETTING:

Choose the appropriate frequency range for your speakers by selecting either the x1 or x20 setting on the frequency multiplier switch. Adjust the fader of the source unit to increase the volume level on channel “A”. Starting from the preset frequency, adjust frequency control downward or upward until you get your desired sound quality.

CHANNEL “B” CROSSOVER FREQUENCY SETTING:

Depending on your systems configuration, channel “B” may be used in either a high pass or band pass mode. By selecting the “IN” position on the band pass switch, the band pass frequency control is engaged allowing for top crossover frequency adjustment. Adjust the fader of the source unit to increase the volume level on channel “B”. Just like setting the “A” channels, starting from their respective preset frequencies, gradually adjust the high pass and/or the band pass frequencies downward or upward until you get your desired sound quality.

SUB CHANNEL CROSSOVER FREQUENCY SETTING

Starting from the preset 200Hz, gradually adjust the subwoofer frequency downward to 90Hz. If the bass is still “boomy” or soft sounding, adjust it downward even further until the bass sounds tight and deep. The optimum setting varies from vehicle to vehicle and from individual to individual.

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OUTPUT LEVEL ADJUSTMENT

As in the case of crossover frequency adjustment, when making the output level adjustment it is best to use compact discs or cassette tapes with greater dynamic range.

•Center the tone, balance and fader controls of the source unit (leaving the other controls at their previous positions).

•Set the volume of the source unit to approximately 2⁄3 of its maximum output.

•Starting from their respective preset levels, adjust one output level at a time. With each of the level controls, turn the level up or down until distortion develops, then retrace the path until distortion disappears. Additional adjustment may be required for even stereo balance.

•Optimum output levels vary with the program source (radio, tape or CD). If the optimum output levels for radio differ considerable from those for tape/CD, locate the median levels that are best for both program sources. (Before making output level adjustment for radio, first locate a FM station with strong radio signals.)

•The optimum subwoofer output level changes from time to time, depending on the volume of road noise, which in turn depends on the vehicle speed, wind speed and road surface. With the XM series Bass-Drive™ remote sub gain control port and the R S remote control, the subwoofer output level can be adjusted as and when necessary from the driver’s seat.