LJM Mono Class AB L12-2 Power Amp board Assembled 120W +-55V with Heatsink
Description:
ONLY FOR PROFESSIONALS
Package:
1 x L12-2 Audio Power Amplifier Board (with heatsink )
Description:
ONLY FOR PROFESSIONALS
Supply voltage + -55V or less.
Power = 120W / 8R + -50V voltage
Power = 120W / 8R + -50V voltage
200W 4R + -50V voltage
THD <0.0005% 1K HZ 10W
SR = 35V / US
Damping coefficient> 200, 8ohm load
Input sensitivity = 1.6V Output 120W 8R
Frequency response range = 15HZ-50K HZ (-3DB)
20HZ * 20K HZ = -0.02 DB
Quiescent current = 80MA
Voltage range = DC plus or minus + -12V to + -55V
Voltage magnification = 31 times
Test chart:
Input signal-THD + N test
When the input voltage is 700MV, the output voltage is about 23VPP load is 8 ohm resistor.
Figure 5 test: using 8 ohm 1000W power resistor.
THD + N approximately = 0.0009%. (photo 7)
Frequency response:
20HZ-20KHZ <-0.02DB (photo 8)
THD + N (photo 9)
20HZ-20KHZ <-0.02DB (photo 8)
THD + N (photo 9)
PCB with 2MM thickening material 75 UM thick copper film.
Voltage magnification is 31 times.
Voltage magnification is 31 times.
Quiescent current per channel is 40MA level: CLASS AB.
Small signal tube original TOSHIBA low noise tube, the original ON low noise tube as a current source and voltage amplification,
Output tube imported Sanken UHF FT 70M, multi-emitter LAPT audio name tube.
2SA1186 2SC2837, two pairs of output tubes per channel.
One channel only needs to be installed in the radiator on the big pipe.
Large pipes can be installed on different radiators.
At + -50V. 8 European load can output 120W power.
Test, the load is 6.6 Ω, photo 10,photo 11
Package:
1 x L12-2 Audio Power Amplifier Board (with heatsink )
