4 Channel

Stinger SPX700X4
AudioControl ACM-4.300 Four-Channel Amplifier
AudioControl LC-4.800
Alpine PXE-M60-4 6-Channel Sound Processor
AudioControl D-4.800 4 Channel Amplifier with Built-In Digital Sound Processor
Alpine KTP-445U Power Pack Amplifier
Alpine KTA-30FW Compact 4-channel Amplifier
Focal AP-4340 4-channel class AB amplifier
Alpine S-A32F S-SERIES 4 Channel Amplifier
Kicker KXMA400.4
FOCAL FDS 4.350 COMPACT 4 CHANNEL AMPLIFIER
MTX Audio Thunder75.4 Thunder Series 4 Channel Amplifier
Alpine KTA-450 4CH Power Pack Amplifier
HELIX M FOUR 4-CHANNEL AMPLIFIER
Alpine Status HDA-F60 Hi-Res Audio 4 Channel Amplifier
Alpine R2-A60F Next-Generation R-Series 4-Channel Amplifier
Alpine S2-A36F S2-Series 4-Channel Amplifier
MB Quart MBQ-RA1-280.4 70 WATT X 4 REFERENCE AMPLIFIER
AudioControl ACX-300.4 All Weather Four Channel Amplifier