OSD Audio SMP60 Mono Subwoofer Amplifier B&H Photo Video
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Alpine HDA-M80 Status Series Mono Subwoofer Amplifier, 800 watts RMS a — Automotive Sound and Protection
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Kicker Pxa300.1 300-watt Waterproof Class D Mono Subwoofer Amplifier : Target
Kicker® CXA1200.1 1200-Watt Mono Class D Subwoofer Amplifier-46CXA12001 | Audio Express | Western United States