Details：

Based on the famous American ARC balance preamplifier circuit.

Low render and low distortion amplification

4 ways audio input ：2 groups RCA +2 groups balance

2 ways audio output ：1 ways RCA +1 ways balance

Audio switch board size：70x230mm

Power supply board size：100x230mm

Preamp board size：160x230mm

Tubes model:
ECC82=12AU7 x2
ECC88=6911=6N11 x 2
6x4 x1

Work voltage：
AC300V-0-AC300V @ 0.1A
0-AC14V @3A
0-AC5V @2A


Gold-plated PCB on both sides

HiFi audio resistors and capacitors components.

Gold tube seat

Note :

Diy kit ：all the parts need yourself to solder.（not included potentiometer ，Balanced isolation transformer，XLR socket ，RCA and 5pcs tubes）

Assembled board：have solder well，（not included potentiometer ，Balanced isolation transformer，XLR socket ，RCA and 5pcs tubes）

Suitable transformer：

https://www.ebay.com/itm/164811294358

https://www.ebay.com/itm/164826836049

Suitable chassis：

https://www.ebay.com/itm/165928549489

Balanced isolation transformer：

https://www.ebay.com/itm/164811066923

Potentiometer Extend Shaft：

https://www.ebay.com/itm/163697804268

Potentiometer link：