Free-Air Resonance
(Fs – Hz) 25.1
Maximum Excursion
(Xmax –in/mm) 0.57/14.5
Surround
Hi-roll rubber
Total Q
(Qts) 0.49
Vented Polepiece
Yes
Voice Coil Height
(Hvc – in/mm) 1.45/37
Motor Force Factor
(Bl – Tm) 17.13
Mechanical Q
(Qms) 7.08
Electrical Q
(Qes) 0.52
Driver Radiating Area
(Sd – in2/cm2) 128.7/830
Voice Coil
2" (51mm) diameter
Suspension Compliance
(Cms – ?m/N) 156
Voice Coil DC Resistance
(Hvc – in/mm) (Revc – ohms) 3.8
Low-Frequency Transducer
15" (380mm) Polypropylene cone
Compliance Volume
(Vas – ft3 / l) 5.42/153.5
Progressive Spider
Yes
Voice Inductance
@ 1kHz (Levc – mH) 3.05
Magnetic Gap Height
(Hag – in/mm) 0.31/8
Diecast Aluminum Frame
Yes