OSD SMP100 100W Subwoofer Amplifier Mono, Class D, Auto Sensing, 4-8 Ohm, ETL CE Certified - Walmart.com
Source New Module DA-500 500W RMS Class D Plate Subwoofer Amplifier Module on m.alibaba.com
Ak35 800w Home Digital Amplifiers Audio 110-240v Bass Audio Power Bluetooth Amplifier Hifi Fm Usb Auto Music Subwoofer Speakers | Fruugo US
Full Marty by GSG(TM) Flat Pack Subwoofer – GSG Audio Design
1600W Bluetooth Audio Power Amplifier, 4.1 Channel Support 2 Pairs Speakers 1 Subwoofer, Wireless HiFi Stereo Amplifier for Home & Car - Walmart.com
SpeakerPower SP1-300 Subwoofer Amplifier: Madisound Speaker Components, Inc.
Hifi 350w/200w Subwoofer Speaker Digital Active Power Amplifier Board Pure Weight Low Professional Home Audio System 110v~240v - Home Theater Amplifiers - AliExpress