Soldering is an indispensable work in the world of DIY audio. Good or bad of soldering is directly connected to sound quality. Especially in DIY amplifiers, I believe quality of soldering affects sound quality more than circuit design.

Here I will introduce my unique soldering technique.
It has durability that does not deteriorate semipermanently and good sound quality.

Please see this PDF for details.
[Soldering Technique]

[2022/01/05] {Tonochi's soldering technique has been updated}