Hi guys, long time lurker from Chile and finally got the courage to build my own rig.
I want to build a Dynalo and didn't want to open another thread so I'm asking some questions here. If I'm doing something wrong please tell me, I tried to find forum rules without any luck.
I have a pair of Grados 225i (and a pair of all-terrain Koss KSC75), both low impedance headphones. I've never made a DIY amplifier before but I know my way around with electronics, soldering, reading schematics, etc. My knowledge of electronics is a little rusty (regarding calculations mostly), but is part of my curriculum (electrical engineer, although lately my job has to do with lighting industry).
I thought I'd start with a CMoy but I don't need portability and doesn't seem to be too HiFi for my needs. At home I use my NAD amplifier when I'm listening my CD player, TT, etc, but I want to build something for my work/desktop PC. Although I've always have the doubt if a dedicated Headphone amplifier would make a difference vs a big ol' amp...?
So the next one on the list was the Dynalo, and I've been reading for days through all the pages of this topic (and other forums, web pages, old KG site on wayback machine, etc), but since there's a lot of info, some questions arised:
1. I want the Dynalo for my unbalanced Grado with 3.5 and/or 6.35mm outputs; and to use with unbalanced RCA input(s). Is SSDynalo the best option or should I look into something else? I see that it has balanced in/outputs and don't want to build an overkill if I'm not going to use it (at least not yet).
2. What is the last version available of the SSDynalo (or the option you recommend)? Is there an updated BOM/schematics, etc available? (The info inside KG Drive is overwhelming)
3. I would like to use a through-hole version if possible. I know that is not the easiest build to start DIY, but I don't mind start this in a PCB prototype board, in order to later use printed PCB and nice case.
4. I intend to use Sigma22 to power this, since it doesn't seem to be complicated, but since all info is a little old, maybe there's something better and updated.
Those are my questions at the moment. Hope to find help to start this little project! I'm not old, but I'm at a point in my life that I'm starting to do all the "I'll do it later" things I have in mind.
Best regards!
