Recommended for professional audio vocal wedges, or mid-bass in sealed enclosures. Also works well in a vented enclosure as a satellite or monitor. Coaxial design for extended HF. HF device sold separately. Specifications: *Power handling: 250 watts RMS *VCdia: 2" *Le: 0.75 mH *Impedance: 8 ohms *Re: 5.53 ohms *Frequency range: 58-20,000 Hz (with APT-50 super tweeter) *Magnet weight: 38 oz. *Fs: 49 Hz *SPL: 93.3 dB 1W/1m *Vas: 2.3 cu. ft. *Qms: 5.21 *Qes: 0.43 *Qts: 0.39 *Xmax: 5.0 mm *Driver dimensions: Overall Diameter: 10.08"", Cutout Diameter: 9.05", Mounting Depth: 3.98". Eminence