I have an original untouched Pa7 I bought new in ‘86. I am looking for info on updates that can make it better. I saw something about improving the bass in that there is evidently a roll off in the low end that can be improved pretty easily. Right now the amp sounds great and has no issues. I am just looking to make it as good as it can be.
All I have done is adjust bias and checked dc offset. I also replaced output binding posts with Cardas. Any help would be much appreciated.
All I have done is adjust bias and checked dc offset. I also replaced output binding posts with Cardas. Any help would be much appreciated.
On the original PA7 (non-II), it seems the capacitor in the NFB circuit was a very (too) low value, which would reduce the bass some. I think this is what you are thinking of. It is also mentioned in this thread: https://www.diyaudio.com/community/threads/nakamichi-pa7-parts-for-re-cap-and-pots.373297/
Besides that, I would suggest to just check the bias (which you already did) and enjoy the music 🙂
Edit: If you search the forum, you will find a bunch of threads on possible 'updates' for the PA7..
Besides that, I would suggest to just check the bias (which you already did) and enjoy the music 🙂
Edit: If you search the forum, you will find a bunch of threads on possible 'updates' for the PA7..
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