Rockford Fosgate Prime R2-250X1 Mono subwoofer amplifier - Walmart.com
Kicker 46CXA400.1T CX Series mono subwoofer amplifier — 400 watts RMS x 1 at 1 ohm at Crutchfield
TXD10001 EZ-AMP plug and play 1000 watts mono subwoofer amplifier - Taco Tunes - Toyota Audio Solutions
Memphis Audio SRX750D.1 Street Reference Series Mono Subwoofer Amplifier 750 Watts RMS @ 2-Ohms, Remote Bass Knob Included - Used Acceptable - Creative Audio
Kicker 47KEY500.1 Compact mono subwoofer amplifier with automatic tuning DSP — 500 watts RMS at 1 ohm at Crutchfield
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
Mini 300W Mono Channel Digital Amplifier for Subwoofer / Full-Frequency Speaker | eBay