DIY kit L20 SE Stereo Audio power amplifier board Kit AMP A1943 C5200 200W 8R

Specification:
Designed the L20 post-amplifier.
Very good with excellent control, low distortion, wide range of voltage support.
High-power high-current output load.
Each channel 2 of ON Semiconductor original power tubes 2SA1943/2SC5200, the maximum load current of 20A.
Voltage support a wide range of installation of each channel can be any two pairs, four pairs of high-power tube.
Standard suite of high-power tube per channel 2.
Power :   200W8R      350W4R DC ±65V 

Features:
Performance parameters:
Dual AC power range of 12V to AC dual 45V.
Proposed dual-voltage AC 36V.
THD = 0.009% 1K HZ 50W 8R
SR = 35V / US
Noise 92DBU
EIN = 114 DB
Frequency Response 20-20KHZ ±0.5 DB
34 times the voltage gain
All resistors are precision 1% precision resistors copper feet, including the output of high-power high-precision resistors are used.
Double-sided FR4 PCB 2MM thick plate, 75 UM thick copper wire.
The PCB area 113MM width and height 71 MM
All capacitors are imported original.
Four pairs per channel audio power tubes imported original ONSEMI.
High-quality NIPPON CHIEMI-CON series of high-grade LOW ESR decoupling capacitors.
And nichicon or RUBYCON series.
Romote the use of tubes and high-power tube ONSEMI NJW0302G NJW0281G
Toshiba A1930 C5171 and audio-specific import original transistor.
Suite two boards, one board a channel. L20 must use the original transistor, not free to replace other brands and models.
Square-wave test:
Sine wave output +-60V, load 6.6 Europe, the output power of 270WThe selection of authentic licensed original transistor with TOSHIBA ONSEMI, quality assurance.

Package:
1 x DIY kit L20 SE Stereo Audio power amplifier board Kit AMP A1943 C5200 200W 8R

Note:this is a diy kit ,all parts need buyer to solder it ,if need assembled board,pls add extra 6EUR