25/70/100 Volt Switchable (25V taps up to 2.5 Watts; 70V taps up to 20 Watts; 100V taps up to 20 Watts); Sonic Vortex® Ported Transmission Line; 6.5" Fluted Injected Poly Woofer; Aluminum Dome Tweeter; 48 Hz – 24 kHz Frequency Range; 89 dB Sensitivity.