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  1. S

    Adire AVA250 Schematic Diagram

    A number of years ago I built a 142.5L subwoofer with a down-firing 12" Shiva driver, a 15" front passive radiator, and an AVA250 plate amplifier. It has served me well and sounds great! Last week the AVA250 started buzzing. It has an auto-on circuit that when it detects a signal the amp turns...