Amazon.com: OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max : Electronics
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300W 3-Channel Subwoofer Power Amplifier Board 2.1 High Power Amplifier Board 6259264363312 | eBay
AudioControl All-Weather Series 300W Monoblock Class D Amplifier Black ACX-300.1 - Best Buy
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Amazon.com: OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max : Electronics
300W Subwoofer Amplifier | OSD Audio
Amazon.com: Nobsound G2 PRO Hi-Fi 300W Subwoofer Power Amplifier Mono Channel Class D SUB Audio Amp : Electronics
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