I finished replacing the caps in my Fisher 500c by Blackgates and Auricaps. After buring in for two weeks, the sound is very good . However, I still want to further improve the sound by replacing the 40 years old unpolarized power cable. I want to replace it by a three-way polarized power cable...

I finished replacing the caps in my Fisher 500c by Blackgates and Auricaps. After buring in for two weeks, the sound is very good . However, I still want to further improve the sound by replacing the 40 years old unpolarized power cable. I want to replace it by a three-way polarized power cable...

RKV is said to be a great tube amp, and I was curious if RKV is at the same league as Max? Does anyone have the experience of comparing these two amps? Which one sounds better with HD600?

After one week of work, I finally finished Mr. Millett's hybrid headphone amp. Here are the prictures of the amp: This circuit of this amp is designed by Mr. Millett, the owner of Wheatfield audio. He published his design on Audio Xpress and the main purpose is to give new DIYers...

I am currently building Mr. Millet's hybrid amp. There are two buf634 on the board. In Mr. Millet's design, he uses heatsink with each buf634. Since I never install a heatsink before, I have some question. The hole on the heatsink is exactly alligned with the hole on the buf634. Therefore I...