Each speaker include an integrated subwoofer. SPECIFICATIONS AR5 Design/Driver Complement Cabinet – Acoustic Suspension, three-way system, Cabinet construction utilizes critical point internal bracing. Woofer – High power, high excursion, 10 side firing woofer. Midrange – Dual 5.25 MagAlloy®, monocoque construction, cast frame drivers in a Focused Array. Tweeter – 1 Plasma-transferred, Diamond Coated Titanium dome tweeter. Special Features Magnetically shielded transducers. Speaker level inputs and a low-level speaker direct LFE input for Dolby-Digital® and DTS® receivers and processors. Integrated subwoofer driven by Bob Carver/Sunfire® 175 watt RMS internal power amplifier with built in IPC Intelligent Parameter Controll circuit. IPC pre-programmed features: Dynamic compressor Thermal rollback limiter Active low frequency equalization Infrasonic filtering Automatic, signal sensing amplifier turn on/off Frequency Response 23Hz – 23kHz, + 2dB Crossover Frequency 36dB/octave.