TDA7498 Class D subwoofer Amplifier 150W Mono Bass Digital Power Amplifier Board : Musical Instruments - Amazon.com
CT Sounds CT-700.1D 700 Watt RMS Power Class D Monoblock Subwoofer Amplifier | eBay
1500 Watt Rms Class D 1-ch 1/2/4-ohm Stable Monoblock Audio Power Amplifier With Remote Subwoofer Controller - Temu
XRONG Subwoofer Amplifier Home Audio, Bluetooth Amplifier 5.0 Stereo,2.1 Channel Mini Hi-Fi Class D Integrated Amp 80 Watt x2+80 Watt for Home Outdoor Passive Speakers,Powered Subwoofer - Yahoo Shopping