Product Description

SPECIFICATIONs
Nominal Basket Diameter    18″, 457.2mm
Nominal Impedance*    8 ohms
Power Rating**
Watts    650W
Music Program    1300W
Resonance    28Hz
Usable Frequency Range    41Hz – 2.4kHz
Sensitivity***    99dB
Magnet Weight    120 oz.
Gap Height    0.37″, 9.53mm
Voice Coil Diameter    3″, 76.2mm
THIELE & SMALL PARAMETERS
Resonant Frequency (fs)    28Hz
DC Resistance (Re)    6.29
Coil Inductance (Le)    1.9mH
Mechanical Q (Qms)    8.28
Electromagnetic Q (Qes)    0.3
Total Q (Qts)    0.29
Compliance Equivalent Volume (Vas)    441.2 liters / 15.6 cu.ft.
Peak Diaphragm Displacement Volume (Vd)    695cc
Mechanical Compliance of Suspension (Cms)    0.24mm/N
BL Product (BL)    22.1 T-M
Diaphragm Mass Inc. Airload (MMs)    130 grams
Efficiency Bandwidth Product (EBP)    93
Maximum Linear Excursion (Xmax)    6.1mm
Surface Area of Cone (Sd)    1140 cm2
Maximum Mechanical Limit (Xlim)    18mm