KST-36 
Size 1.35"Voice coil
RMS Power:150w
Max Power:300w
Sensitivity:105dB
Magnet:12.5oz
Impedance:8Ω   

KST-37 
Size 1.75"Voice coil
RMS Power:150w
Max Power:300w
Sensitivity:107dB
Magnet:34oz
Impedance:8Ω