Sony XM-GS4 4 Channel Stereo Power Amplifier

Sony XM-GS4 HI‐RES HIGH RESOLUTION 2/3/4 CH Amp 4-Channel Stereo Power Amplifier

DS18 X4 Ultra Compact Class D 4-Channel Car Amplifier 4 x 70 Watts Rms @ 4-ohm

Alpine S-A32F S-Series 320W RMS 4-Channel Digital Class D Car Audio Amplifier

Taramps TS 800x4 800W RMS 2 Ohms 4-Channel Car Amplifier Class D Full Range

Infinity Alpha 2804A 4‑Channel Class AB Car Amplifier 70W x 4 RMS – New

Sony XM-GS100 Mono Amplifier 1100W Class D Car Audio Amp OPEN BOX