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Douk Audio G2 PRO Hi-Fi 300W Subwoofer Amplifier Mono Channel Power Amp Home Audio Gain Control For Home Theater Speaker - AliExpress
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Fosi Audio M03 200 Watt TPA3255 Subwoofer Amplifier Mini Mono Channel Audio Power Amp for Home Theater Full-Frequency and SUB Bass Switchable with 32V/5A Power Supply - Walmart.com
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