3 Way Electronic Crossover
(120-2011)                 Features                   Faxback Doc. # 39520


Your Optimus 3-Way Electronic Crossover System lets you get the best sound
from your autosound system.  It takes the full audio range and splits it
up into three smaller ranges.  High frequencies are sent to the tweeters'
amplifier, middle-range frequencies are sent to the mid-range speakers'
amplifier, and low frequencies are sent to the subwoofers' amplifier.

Since each speaker only gets the frequencies that it handles best, overall
sound quality improves.  The crossover even lets you adjust the specific
frequency ranges that each speaker receives to precisely match its
capabilities.

The crossover's features include:

                     Automatic Power On - the crossover turns on when you
                                          turn on the vehicle's autosound
                                          system (when it is connected to
                                          a switched power lead).

         Subwoofer Phase Shift Selector - lets you adjust the subwoofer to
                                          compensate for acoustic timing
                                          delays between speakers.

                     Bass Boost Control - lets you boost subwoofer bass
                                          output by 12 dB.

     Subwoofer Crossover Point Selector - lets you set the subwoofer
                                          crossover point to 50 Hz, 90 Hz,
                                          or 180 Hz.

     Midrange Crossover Point Selectors - let you set the midrange's lower
                                          crossover point to 50 Hz, 90 Hz,
                                          or 180 Hz for high frequencies,
                                          and its upper crossover point to
                                          2kHz, 4kHz, or 6kHz for low
                                          frequencies.

     High Pass Crossover Point Selector - lets you set the tweeter
                                          crossover point to 2kHz, 4kHz,
                                          or 6kHz.

               Subwoofer Input Selector - lets you select one-line or
                                          two-line input to match your
                                          autosound system's line output.

A complete autosound system using this crossover includes:

    A receiver/CD player/cassette deck that has line-level or
    speaker-level outputs

    The crossover

    Any combination of two tweeters, two midrange speakers, and two
    subwoofer speakers

    A separate power amplifier for each speaker type.

(br/km-05/14/1997)

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