LJM Mono Class AB L12-2 Power Amp Board Assembled 120W +-55V with Heatsink VER5

Supply voltage within+-55V.

Power=120W/8R+-50V voltage

200W 4R+-50V voltage

THD<0.0005% 1K HZ 10W

SR = 35V/US

Damping coefficient>200, 8 ohm load

Input sensitivity=1.6V output 120W 8R

Frequency response range=15HZ-50K HZ (-3DB)

20HZ* 20K HZ =-0.02 DB

Static current=80MA

Voltage usage range=DC positive and negative dual voltage ± 12V to ± 55V

Voltage amplification factor=31 times

 

Improvement compared to VER4 version in VER5 version

1. Replace low-power transistors B649 and D669 with medium power transistor A1837, C4793，

2. Increase the static current of the driving power transistor from 6MA to 18MA.

3. Add a radiator to the medium power tube.

4. Increase the static current adjustment function of the output power transistor, so that the static current of the left and right channel circuit boards can be the same.

5. Use electronic filters to replace the previous RC passive filters and reduce input stage interference.

6. Change the input stage mode to increase the input impedance. Low frequency performance improvement.