+1. All of my 8 mods were fitted with 0.25uF MKP caps to pin 4 and 8. All of them have sonic improvements. Opamps used are either LM 4562HA (metal can), Burson discrete opamps or Audio GD's discrete opamps (Moon, Earth and Sun).
I did try today different capacitors for the lm4562(the silver ones 220nf on picture which i don't know what they are) and they did a very small subttle difference to better SQ.They weren't so bad sounding as the WIMA's????on picture.Can someone confirm if those are original wima's or chinese fake ones,or simply they were in need for more brake in.
Attachments
Chinese fakes can be virtually impossible to spot nowadays, but you know, I have tons of these little guys and I've tried them as bypass caps and just hated them every time. I used larger (size-wise) MKP caps on my LM4562HA. Perhaps these little WIMAs are just sonic poison for some reason? I tried them across Black Gates and they sounded just terrible. I don't try to bypass caps like that any more.
Sorry, I don't have schematic handy right now. I'll reply when I have part numbers. Did you remove any caps that you did not replace?
Sorry, I don't have schematic handy right now. I'll reply when I have part numbers. Did you remove any caps that you did not replace?
All aboard the rollercoaster.
Cool, try doing that! I think you can probably just snip those jumpers for a quick fix and report back. Fingers crossed.
At the end of the day, the CD63/67 sound pretty great in stock form, but are capable of much more with some investment of time and well-executed mods. If your player sounds downright bad after nodding then there could be something wrong. Man, I've had my share of that. My servo secondaries were wired out of phase for ages!
Cool, try doing that! I think you can probably just snip those jumpers for a quick fix and report back. Fingers crossed.
At the end of the day, the CD63/67 sound pretty great in stock form, but are capable of much more with some investment of time and well-executed mods. If your player sounds downright bad after nodding then there could be something wrong. Man, I've had my share of that. My servo secondaries were wired out of phase for ages!
Well everything works as they should.1 thing about this player, at least mine,work every time what ever fooliness i did to it.+1 for that.
Now to sonic results....i am not shure if i want to take it further,because i don't know the upcoming.
From stock form, all veils are removed.Timing is way better than stock and slam attack is better.Base is way much better with deeper notes nicely stopped.
Mids are a bit forward but bigger sounstage and better vocals all over.Highs are still what is bug me...still are agressive and in your face.In some recordings which they are dool sounding...this is ok,but overall not my cup of tea.
Compared to my stock TDA1541 players, the 63 has better slam and notes on base fade more nicely....tda goe's deeper in lows but also feels wooly.
Mids...tda is much better but not that huge difference from stock 63.
And the highs....here tda wins hands down....simply there is no comparison.
Now both of those dacs compared with my LENCO L75 heavily modified.....i prefer to not make any comments for the comparison.....
Thanasis.
Now to sonic results....i am not shure if i want to take it further,because i don't know the upcoming.
From stock form, all veils are removed.Timing is way better than stock and slam attack is better.Base is way much better with deeper notes nicely stopped.
Mids are a bit forward but bigger sounstage and better vocals all over.Highs are still what is bug me...still are agressive and in your face.In some recordings which they are dool sounding...this is ok,but overall not my cup of tea.
Compared to my stock TDA1541 players, the 63 has better slam and notes on base fade more nicely....tda goe's deeper in lows but also feels wooly.
Mids...tda is much better but not that huge difference from stock 63.
And the highs....here tda wins hands down....simply there is no comparison.
Now both of those dacs compared with my LENCO L75 heavily modified.....i prefer to not make any comments for the comparison.....
Thanasis.
+1
When all these basics have been done there will be BIG BIG improvements in SQ 
The next on the line would be BIG TXs
D811-814 are for the servo circuit and the +5V supply to the other circuitries like DAC and decoders etc.
D801-804 are for the opamps and I also recommend you to change these.
From my experience the SQ has some improvements after changing the 8 stock diodes which is more smooth to my ears after changing. None of my 8 mods got aggressive sounding at all. Don't know why yours is different.
I used BYV95A controlled avalanche diodes.
Last edited: