Bang & Olufsen (B&O) BeoLab 2 Active Subwoofer (WORKS WITH 220v ONLY) | eBay
BAS 100 active subwoofer which requires 220v power | eBay
110/220v Hifi Mono 350w Heavy Subwoofer Digital Active Power Amplifier Board Pure Bass Professional Home Audio System - Home Theater Amplifiers - AliExpress
SVS SB-3000 Subwoofer 220 Volt | Audio Advice
110V/220V HIFI Mono 150W Heavy Subwoofer Digital Active Power Amplifier Board Pure Bass Professional Home Audio Stereo System - AliExpress
Amazon.com: Taidacent Car Subwoofer Power Amplifier Board 220V 12V 24V Universal Audio Speaker Amplifier Built-in Bluetooth Car Amplifier : Musical Instruments