rear speaker specification:
Type: 3" full range speaker
Frequency response: 120Hz-18KHz
Sensitivity: 83dB
Impedance: 4 Ohm
Magnetic shielded: Option
Rated power: 15W
Max power: 30W
Full range speaker:3" x 1
Dimensions: 125 x 145 x 125 (mm) (W x H x D)
Cabinet material: Fiber glass