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Alpine 3321 Equalizer Owner's Manual and Wiring Diagram
Pre-amp 11-band Graphic Equalizer with Subwoofer Output

Your Alpine Model 3321 offers the latest pre-amp and graphic equalizer technology in the smallest chassis possible. Its aesthetic appearance and controls are the result of a thorough consideration of ergonomic design.
The subwoofer output is an additional bonus for when you wish to enrich your system's bass sound with subwoofers.
Please read this manual thoroughly to familiarize yourself with all controls and operating procedures.