Kicker 47KEY500.1 Compact mono subwoofer amplifier with automatic tuning DSP — 500 watts RMS at 1 ohm at Crutchfield
Kicker Pxa300.1 300-watt Waterproof Class D Mono Subwoofer Amplifier : Target
300W Subwoofer Amplifier | OSD Audio
Kicker 46CXA400.1T CX Series mono subwoofer amplifier — 400 watts RMS x 1 at 1 ohm at Crutchfield
AudioControl ACM-1.300 ACM Series compact mono subwoofer amplifier * 300 watts RMS x 1 at 2 ohms - Breakers Stereo and Performance
Focal FPX1.1000 Performance Series Mono Subwoofer Amplifier - 1,000 Wa — Automotive Sound and Protection
lc-1.1500 high-power mono subwoofer amplifier with accubass® - All Star Car Audio
Memphis Audio SRX750D.1 Street Reference Series Mono Subwoofer Amplifier 750 Watts RMS @ 2-Ohms, Remote Bass Knob Included - Used Acceptable - Creative Audio
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