Tube Amplifier Kits & Finished Boards

  This kit does not contain tubes and output transformers. You need to contact customer service for the finished board to change the price. The production difficulty is simpler than that of ordinary discrete power amplifiers. The reason is very simple. You only need...

If you choose 225 yuan, the board kit is only the components on the board and does not contain tubes. The boards with both price options need to be welded by yourself. If you weld the finished board on behalf of you, add 55...