Seven compact speakers are included in the HTS9605 compact home theater system. DSWPRO 400 - 8-Inch, 180W (360W peak) powered subwoofer. This feature packed subwoofer includes feed forward distortion suppression technology, and Polk Room Optimization. The RX-V663 features time-tested Yamaha construction to deliver thrilling home theater audio performance. You get seven channels of clean, high-current amplification and exclusive Yamaha Cinema DSP processing.