Details：

Phono board pcb size：120 x120mm

Work voltage: DC260V-280V

Filament voltage:DC12.6V

The low frequency of the guts dives deeper, and the mid-high frequency is more charming

W1: Left channel input
W2: Right channel input
GND under C1 and C2: Audio input GND
W3/W4: Filament power input / DC12.6V
W5: High voltage input/about DC280V
W6: Hight voltage GND
W7: High voltage input about DC280V
W8: Audio output GND
W9: Left channel output
W10: Right channel output

Use tube:
ECC83 / 12AX7 *4

Package included：

Phono board pcb x 1

Not included any parts ！

Power supply board pcb:

https://www.ebay.com/itm/354090808020