1" diameter pure titanium dome1" diameter copper clad aluminium edgewound voicecoilFlat on-axis frequency response 3kHz~27kHzSensitivity 92dB 1w/1mPower rating 30w RMS 60w peakImpedance 8ΩHF component for JBL 4406, JBL 4408 and JBL 4410 monitor loudspeakers