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Amazon.com: OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max : Electronics
Amazon.com: Fosi Audio M01-BT Bluetooth 5.0 300 Watt Subwoofer Amplifier Home Theater Full-Frequency Mini Stereo Audio Hi-Fi Mono Power Amp with Bass Gain Control for Passive Subwoofer Speaker Bass Shaker : Electronics
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Amazon.com: Ashdown Studio 210 2 x 10-inch 300-watt Bass Combo Amp : Musical Instruments
Amazon.com: Pyle Home Audio Power Amplifier System - 300W 4 Channel Theater Power Stereo Sound Receiver Box Entertainment w/ USB, RCA, AUX, Mic w/ Echo, LED, Remote - For Speaker, iPhone, PA,
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Amazon.com: Nobsound 100W Subwoofer Amplifier Digital Power Sub Amp Audio Mini Bass Amp with Power Supply (Black) : Electronics
Amazon.com: Nobsound G2 PRO Hi-Fi 300W Subwoofer Power Amplifier Mono Channel Class D SUB Audio Amp : Electronics