• Nominal impedance, 4 Ω
• DC resistance, Re 3.5 Ω
• Voice coil inductance, Le 1.27 mH
• Effective piston area, Sd 340 cm²
• Voice coil diameter 38.5 mm
• Voice coil height 16 mm
• Air gap height 9 mm
• Linear coil travel (p-p) 7 mm
• Magnetic flux density 0.72 T
• Magnet weight 0.1 kg
• Net weight 0.94 kg
• Free air resonance, Fs 27 Hz
• Sensitivity (2.83 V / 1 m) 91.5 dB
• Mechanical Q-factor, Qms 4.94
• Electrical Q-factor, Qes 0.30
• Total Q-factor, Qts 0.29
• Moving mass incl.air, Mms 64 g
• Force factor, BI 11.2 Tm
• Equivalent volume, Vas 88 liters
• Compliance, Cms 0.54 mm/N
• Mechanical loss, Rms 2.2 kg/s
• Rated power handling* 80 W

Shallow light weight design. Hard pressed vented paper cone (made in-house). Inverted low damping rubber surround. Symmetric suspension. Stacked neodymium motor with built-in soft limiting. Non-conducting fiber glass coil former. long life lead wires.