Materials of construction
- Kapton coil former
- Polyamide-imide coated two-layer aluminium voice coil for lower mass & increased sensitivity
- Ferrite magnet
- Vented core for increased power handling
- Premium pressed steel basket for maximum strength
- Paper cone
- Cloth cone edge
- Solid composition paper dust cap Performance optimised for midrange use between 400 Hz & 4k Hz in multiway systems. Also suitable for vocal P.A. keyboards club systems stage monitors & bass guitar. Eminence Model No. Beta 8 Nominal Chassis Diameter 8 203.2mm Impedance 8 Omega Power Rating 225 Wrms Resonance 58 Hz Usable Frequency Range 55 Hz to 4k Hz Average Sensitivity 1W 1m 97d B Magnet Weight 34oz. Magnet Gap Depth 0.312 7.94mm Voice Coil Diameter 2 50.8mm Mounting Information Overall Diameter 8.24 209.2mm Baffle Hole Diameter 7.13 181mm Front Sealing Gasketfitted as standard Rear Sealing Gasketfitted as standard Fixing Holes Diameter 8 off 0.218 5.5mm Fixing Hole P.C.D.7.75 196.9mm Depth 3.5 89mm Weight 6.1lbs 2.78kg Shipping Weight 7.6lbs 3.5kg Thiele-Small Parameters Resonant Frequency fs 58 Hz Impedance Re 6.36 Omega Coil Inductance Le 0.58m H Electromagnetic Q Qes 0.36 Mechanical Q Qms 6.54 Total Q Qts 0.34 Compliance Equivalent Volume Vas 35.4 litres 1.25 cu.ft Peak Diaphragm Displacement Volume Vd 65cc Mechanical Compliance of Suspension Cms 0.55mm NBL Product BL9.4 T-MDiaphragm Mass inc. Airload Mms 14 grams Equiv. Resistance of Mechanical Suspension Loss Rms 0.76 Nsec M Efficiency Bandwidth Product EBP163 Voice Coil Overhang Xmax 3.0mm Surface Area of Cone Sd 214.1cmsup 2sup Impedance at Resonance Zmax 123 Omega