Nobsound NS-03G SUB Mini Mono Channel Digital Amplifier HiFi Home Subw– doukaudio
MTX THUNDER1000.1 Mono subwoofer amplifier — 1,000 watts RMS x 1 at 1 ohm
Amazon.com: Fosi Audio M04 Subwoofer Amplifier for Home Theater Mono Channel Digital Class D Integrated Power Amp for Passive Speakers Subwoofer Rated 100W MAX : Electronics
SP2-2400-HT Dual Mono Subwoofer Rack Amplifier
OSD 200W Mono Class D Subwoofer Amplifier 4Ohm Stable Auto-On Compact SMP200 810281013633 | eBay