active usb professional speaker 1.With USB, SD card reader 2.Volume treble 3.With MIC jack 4.EQ

Great China red professional speaker SP-3018

1. Output power: 70*2

2. THD:10%

3. S/N Ratio: >85db

4. Separation: >50db

5. Transformer:360mv 

6. Impendency: 4-16OHM

7. Distoration: < 10%

Speaker size:30.3*32.7*62.2cm

Carton size: 72.7*35*67.5cm

Packing 2 pcs/ carton

20ft" 174 carton

40ft" 355 carton

40HQ 380 carton

Great China red professional speaker SP-3018