Master Audio BST03/4

 Power output: 350 W

- Impedance: 4 Ohm

- Sensitivity: 105 dB

- Frequency response: 2.500 - 25.000 Hz

- Voice coil diameter: 25.4 mm

- Housing material: Aluminum

- Magnet weight: 5.2 Oz

- Diameter: 96 mm.