Check the listing for details. B&C DE400 1" Polyimide Neodymium Compression Driver 8-Ohms 100 Watts 1200-1800Hz. Condition: New. Listed at 150.52 USD. B&C DE400 1" Neodymium Polyimide Compression Driver 8-Ohms 100 Watts 1200 - 18000 Hz Features 100 W continuous program power capacity 1' horn throat diameter 44 mm (1.7 in) aluminium voice coil Polyimide diaphragm 1200 - 18000 Hz response 108.5 dB sensitivity Compact Neodymium magnet assembly Specifications Throat Diameter 25 mm (1 in) Minimum Impedance 7.7 Ω Continuous Power Handling 100 W Frequency Range 1 - 18 kHz Voice Coil Diameter 44 mm (1.7 in) Inductance 0.11 mH Magnet Material Neodymium Ring Nominal Impedance 8 Ω Nominal Power Handling 50 W Sensitivity 108.5 dB Recommended Crossover 1.6 kHz Winding Material Aluminium Diaphragm Material Polyimide Flux Density 1.8 T Mounting and Shipping Info Other details 2x M6 Mounting Studs with bolts and washers included Depth 44 mm (1.7 in) Shipping Units 1 pcs Shipping Box 105x105x65 mm (4.13x4.13x2.56 in) Overall Diameter 85 mm (3.3 in) Net Weight 0.86 kg (1.88 lb) Shipping Weight 0.89 kg (1.95 lb) Service Kit hf Replacement Diaphragm MMD4008