1. AC220v power supply can also be set to AC110v 2. Size: 200x130x42mm/7.9x5.1x1.7"(lxwxh) 5. Max power 1000w, 4 ohm load 6. Rms power: 500w, 4 ohm load 7. rms power: 300w, 8 ohm load 8. channel: mono 9. preamp output voltage + 15v, Ov, -15v 10. fan voltage output + 24v Specifications: 1. amplifier: J115D-AMP2. amplifier type: class D digital amplifier (switching power supply)3. board color: blue4. channel: mono (not stereo)5. bridged: no6. maximum power: 1000w 7. rms power: 500w, 4 ohm load (one 4 ohm speaker) 8. rms power: 300w, 8 ohm load (one 8 ohm speaker) 9. rms power: 500w, 8+8 ohm load (two 8 ohm speakers used in parallel) Answer 10. frequency: 20hz-20khz at-2db 11. 11. Distortion: thd 1% at 1khz (4 ohms) 12.12. Board size: 200x130x42mm/7.9x5.1x1 .7" (lxwxh) 13.Net weight: 0.8kg/1.8lb 14. Input working voltage: AC100-120V 60hz connection, cp3 and cp4 15. 15. Input working voltage: AC200-240V 50hz, cp3 a T cp4b are not connected 16. 16. Input working voltage error: +/-10% 17. 17. Need to add 24v fan: yes 18. 18. Amplifier main supply voltage: +79v, Ov, e-79v 19. 19. Output voltage for preamp board: +15v, Ov, e-15v 20.20. Fan output voltage : 24v 21. 21. Input sensitivity: amplitude: 1.5v;frequency: