Kitsunesuki

Few days before, I was doing some packing I happened to chunk out some rare gems. My first DIY headphone amp stashed under my bed. I just plunged into it without any knowledge of any electronics and crawl my way through. Pardon the electronics jargon as they is no other way to discribe them. It will make some sense to someone who is electronically trained.

Its the PPA v 2 amp. So far I have not seen anyone else having this amp. Its fairly quite an expensive project to couple to my Alessandro MS1.

Basically the board is populated with premium parts. My friend say it look like a pinball table.
I spent like 6 hours inside Koba in chinatown for parts. The capacitors are Rubycon(Red),  rare Duorex (Purple), Wima (Pink). Honestly I think the current banks of Rubycon is an overkill, acutally 4 will suffice. Very tightly matched transistors for the L R G channel. During the beta testing process, I accidently blow up one of the channel. The resistor smoked up and I have to replace that whole channel transistors with another alternatives as the original blown up ones are hard to come by. The headphone jack is a spring jacked Canare.

The base operation for the amp is the 3 OPA627 opamp that I got from USA. 50% of the parts are from USA which includes the board, the Rudycons and the log volume control RK27 which cost a whooping USD16. When fine tuning the circuitry, I have to fork out fluke DMM due to the precision needed.

End result is bliss to the ears.

PS: Notice the tube beside it, thats the leftover tube from my fail tube amp project.

Later on I made my own customised cable with Canare F-12s and starquads cable.

This is my headphone the Alessandro MS-1. The amp gain is tuned to match the Alessandro.

Finally my MP3 player which pump music into my headphone.

Overall quite an experience, to learn how to match transistors, how to get opamp for free from USA,

http://headwize.com/projects/cavalli2_prj.php This is the tube project that I failed. Will be restarting soon if I have the time.