Voice coil Impedance: 6/8/12 Ohm 
Voice coil Dimensions: ∅18*6*4mm 
Rated Voltage: 12V DC 
Operating Voltage: 10～15V DC 
Output Power: 15W/20W/25W 
Min.S.P.L: 100-113dB (at Rated Voltage at 1m) 
Max.Rated Current: 500/800/1400mA 
Tone Nature: warble/1-Tone/6-Tone 
Operating temperature: -10°C to +50°C 
Weight: 200 ±10g