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KASA500 Subwoofer Amplifier | KEF USA
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PSB-200 Subwoofer Amplifier with Crossover / Phase Control - 200W – Soundavo
JL Audio JD1000/1 Monoblock Class D Subwoofer Amplifier 1000 W
Amazon.com: Fosi Audio M04 Subwoofer Amplifier for Home Theater Mono Channel Digital Class D Integrated Power Amp for Passive Speakers Subwoofer Rated 100W MAX : Electronics
Amazon.com: Nobsound NS-03G Subwoofer Amplifier 100W Mini SUB Power Amp : Electronics
2.1 Channel Subwoofer Amplifier Board High Power Audio Amplifier Board Module (200W) (motherboard and knob), Premium - Walmart.com