DS18 H-KO5 5000 Watt Monoblock Subwoofer Car Amplifier Class D Mono Sub Bass Amp 810005186407 | eBay
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Power Acoustik RZR1-2500D Amplifier | RAZOR Series Subwoofer 1-Channel Amplifier | 2 Ohm Max Power 2,500 Watts - Walmart.com
Amazon.com: BOSS Audio Systems PD5000 Phantom 5000-Watt, 1, 2, 4 Ohm Stable Class D Monoblock Car Amplifier with Remote Subwoofer Control : Electronics