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Eminence Model No. Beta 15
Nominal Chassis Diameter: 15, 318mm
Impedance: 8Ω
Power Rating: 350Wrms
Resonance: 35Hz
UsableFrequency Range: 35Hz to 4kHz
Average Sensitivity 1W @ 1m: 98dB
MagnetWeight: 34oz.
Magnet Gap Depth: 0.312, 7.94mm
Voice Coil Diameter: 2, 50.8mm
Mounting Information
Overall Diameter: 15.15, 384.8mm
Baffle Hole Diameter: 13.77, 349.6mm
Front Sealing Gasket: fitted as standard
Rear Sealing Gasket: fitted as standard
Fixing Holes Diameter (8 off): 0.25, 6.4mm
Fixing Hole P.C.D.: 14.56, 369.9mm
Depth: 6.05, 153.6mm
Weight: 9lbs, 4.08kg
Shipping Weight: 11lbs, 5kg
Thiele-SmallParameters
Resonant Frequency (fs): 35Hz
Impedance (Re): 6.32Ω
Coil Inductance (Le): 1.10H
Electromagnetic Q (Qes): 0.63
MechanicalQ (Qms): 8.1
Total Q (Qts): 0.58
Compliance Equivalent Volume (Vas): 334.6 litres 11.82 cu.ft
Peak Diaphragm
Displacement Volume (Vd): 327cc
Mechanical Compliance
of Suspension (Cms): 0.35mm/N
BL Product (BL): 11.5 T-M
Diaphragm Mass inc. Airload (Mms): 60 grams
Equiv. Resistance of Mechanical SuspensionLoss (Rms): 1.61N*sec/M
Efficiency Bandwidth Product (EBP): 55
Voice Coil Overhang (Xmax): 4.0mm
Surface Area of Cone (Sd): 823.7cm2
Impedance atResonance (Zmax): 88Ω 11.82 cu.ft