active profession speaker 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