Details：
Reference - American Gary CARY-SLP90 circuit, the circuit sound with High details, medium and low frequency very thickness.
High-voltage power supply uses Toshiba K2700 FET as a high-voltage power supply adjustment Transistor.
The filament power supply uses a single-input and double-out voltage regulation mode to supply power to the left and right channels respectively.
PCB size: 155x177x1.6MM FR4
Work voltage:
0-220V AC >=30mA (200-220V are all ok)
0-14V >=0.8A (AC12-AC15V are all ok)
Tube model：12AU7 /ECC82 * 4 （default price not included tubes）
Silver plated ceramic electronic tube seat
BC capacitance
MKP coupling capacitance
Taiwan produced 3W 1% precision metal film resistor
Note：
Diy Kit：all parts need buyer to solder it ！（not included 4pcs tubes）
Assembled Board：have tested it well ！（not included 4pcs tubes）
