1″ LTS (Linear Travel Suspension) titanium diaphragm tweeter with Tractrix® horn.dual 4″ Cerametallic™ cone woofers with rigid and lightweight voice coils.frequency response: 37-25,000 Hz (±3dB)sensitivity: 95 dB.power handling: up to 75 watts RMS (300 watts peak)impedance: 8 ohms compatible.