4508ND Specification

Throat diameter: Rectangular piston 8" x 3/4" (215.6 x 19 mm)
Nominal impedance: 8 or 16 Ohm
Efficiency: 35% (300 - 5000 Hz)
Power capacity:  
Mid range (AES): 150 W above 450 Hz
Peak: 1000 W above 500 Hz
High range (AES): 80 W
Peak: 320 W
Sensitivity: 112 dB on 90° x 10° horn
Frequency range: 400 - 22000 Hz
Recommended crossover: Mid: 400 Hz, High 6.3 kHz
Middle frequency range: 400 - 7000 Hz
High frequency range: 6000 - 22000 Hz
Mid/high crossover: 6300 Hz
Voice coil mid range: 3.5" (90 mm)
Voice coil high range: 1.75" (44.4 mm)
Magnet material: Neodymium
Flux density mid range: 1.95 Tesla
Flux density high range: 2.2 Tesla
Voice Coil Material: Copper Clad Aluminum
  (2 layers inside and outside of the VC)
Voice Coil Former: Kapton TM
Diaphragm Material: Polyester
 
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