Lowther EX4 Drive Unit
EX4 Drive Unit with new cone assembly.EX4 Drive Unit
DC Resistance of Voice Coil Re 7.4 ohms
Free Air Resonance Fo 45 Hz
Emission Piston Area Sd 0.021M²
Equivalent Volume Suspension Vas 62.908 Ltrs
Suspension Compliance Cms 1005 u M/N
Mass of Cone Mmd 11.0 g
Mass of Moving Parts Mms 12.75 g
Force Factor Bl 10.233 T-M
Mechanical Q Factor Qms 3.781
Electrical Q Factor Qes 0.248
Total Q Factor Qts 0.233
Voice Coil Inductance @ 1 kHz Le 28.071 uH
Reference Efficiency No 2.154%
Sound Pressure Level SPL 95.351 Db