Sundown Audio SAE-500.5 Class A/B+D 5-Channel Amplifier - 80W x 4 + 500W x 1 @ 1
High-Power Precision: Sundown Audio SAE-500.5 (SAEv4-900.5) 5-channel amplifier powers your entire system: 80W x 4 (Class A/B) for speakers and 500W x 1 @ 1Ω (Class D) for subwoofers (also 225W x 1 @ 2Ω).