Eminence Delta-10A 10" Midrange Driver 8 ohm 99dB 2.5VC Replacement Speaker Recommended for professional audio and bass guitar applications as a woofer/mid-bass or midrange in vented monitors, satellites and multi-way enclosures. Specifications Model Delta-10A Nominal Impedance(Ohms) 8 ohms Power Handling(RMS) 350 Watts Power Handling Range (RMS) 700 Watts Usable Frequency Range(Hz) 63 to 3,700 Hz Sensitivity(dB) 98.8 dB 1W/1m Magnet Weight(oz) 56 oz. Voice Coil Diameter 2.5" Coil Former Kapton® / Polyimide Voice Coil Wire Material Aluminum Magnet Composition Ferrite Basket Material Steel Cone Composition Paper Surround Composition Cloth Net Weight(lb) 24 Resonant Frequency(Fs) 66 Hz DC Resistance(Re) 5.42 ohms Coil Inductance(Le) 0.74 mH Mechanical Q(QMS) 6.53 Electromagnetic Q(Qes) 0.35 Total Q(Qts) 0.33 Compliance Equiv Vol (Vas) 1.1 ft3 Mechanical Compliance(cm2) 0.18 mm/N BL Product(Bl) 14.4 Tm Moving Mass(MMs) 32g Surface Area of Cone(Sd) 344.9 cm2 Max Linear Excursion(Xmax) 3.5 mm Mounting and Shipping Information Overall Diameter 10.09" Nominal Diameter 10" Baffle Hole Diameter 9.05" Depth 4.25" No of Mounting Holes 8 Sealed Volume 0.18 ft3 Sealed F3 171 Hz Vented Volume 0.43 ft3 Vented F3 104 Hz