Most efficiently used tweeter in musical instrument and sound reinforcement DJ speaker systems, it is also popular for use in automotive speaker boxes. Piezoelectric design offers excellent transient response, high efficiency and very high immunity to burnout. Making this a very inexpensive and reliable tweeter to incorporate into any speaker system. 
Power capacity: 75W/150W RMS/max
Frequency response: 2KHz~20KHz
Mounting flange dimensions:
3⅜" x 3⅜"
Required opening: 3⅛" diameter
Depth: 3"