JL Audio RD900/5+ RD Series 5 Channel Stereo Subwoofer Amplifier 900w RMSRD900 5 5 Ch. Class D System Amplifier, 900 W 5 Channel Class D System Amplifier, 70 W x 4 @ 4 + 500 W x 1 @ 2 14. 4V Crafted as an all in one, total system solution, the RD900 5 is engineered to power a complete audio system consisting of a subwoofer + four satellite system with 900 watts of high performance sound. Equipped with our exclusive NexD switching technology, this complete power package efficiently generates a potent 70 watts of crystal