Rockford Fosgate T400-4 Power 4 Channel Class AB 400 Watt Car Amplifier

Nemesis Audio NA-400X4D 400W 4-Channel Car Stereo Amplifier - Black

Clarion XR5420 Class D 400W RMS 4-Channel Motorcycle Amp Car Audio Amplifier

MM ELECTRONICS MGT 207 EQUALIZER AMPLIFIER - SUPER RARE 80'S BRITISH CAR AUDIO

NVX NBA201 1400W Peak (700W) RMS N-Series Class A/B 2-Channel Amplifier

Clarion XR5420 Class D 400W RMS 4-Channel Motorcycle Amp Car Audio Amplifier

U.S Amps USA-200

Zapco ST-4X II. 4-Channel Full Range Class A & B Amplifier.