My NAD C515BEE is finished............. - Page 13

nad · 20th November 2009, 08:57 PM

Quote:

Originally Posted by Andrea:

Just wanted to say that to me transparency is supposed to sum up everything, i.e. it's a synonym of the very idea of sonic fidelity. In that sense the LT1028 is transparent, less so the LM4562.

Sorry to dissapoint you but I'm not looking for opamps.

nad · 20th November 2009, 09:06 PM

Where to buy Elna Silmics???? Need 10 x 10uf 50v and 8 x 47uf 25v

Andrea: · 20th November 2009, 09:20 PM

Wait, you said the sound is bright? Meaning that of the CD player? Didn't you use the LME49720HA there? Where did you put the LM4562? Sorry, didn't have the patience to read all posts.

Anyway the LME49720HA can be bright per se..

nad · 20th November 2009, 09:23 PM

Quote:

Originally Posted by Andrea:

Wait, you said the sound is bright? Meaning that of the CD player? Didn't you use the LME49720HA there? Where did you put the LM4562? Sorry, didn't have the patience to read all posts.

Anyway the LME49720HA can be bright per se..

49720 in the cdp, 4562 in the amp. Didn't sound bright until cap swaps.

mikesnowdon · 20th November 2009, 09:32 PM

Quote:

Originally Posted by nad

So all caps to ground are decoupling, then there's the signal caps and last but not least, anything not in those 2 (decop/signal) are feedback??

There might be other feedback caps on the preamp section but the ones to play with are the 2 47uF/25v ZA'a that we identified earlier. 100uF Silmics in this position could be just the ticket

mikesnowdon · 20th November 2009, 09:33 PM

Quote:

Originally Posted by nad

Completly right in the dynamics but what is PRaT???

PRaT = Pace, Rhythm, and Timing. For a great example of this have a listen to some Naim gear.

Andrea: · 20th November 2009, 09:42 PM

Quote:

Originally Posted by nad

49720 in the cdp, 4562 in the amp. Didn't sound bright until cap swaps.

I don't think it's a good pairing sonically. I would replace the LM4562 with something else... Then you can consider replacing all the caps again. I would try with a Browndog with 2x OPA132UA on it. It really can be a cure (for brightness as well as musicality).

nad · 20th November 2009, 09:43 PM

Quote:

Originally Posted by mikesnowdon

There might be other feedback caps on the preamp section but the ones to play with are the 2 47uF/25v ZA'a that we identified earlier. 100uF Silmics in this position could be just the ticket

Will do. Looked at them Tantalums...... bit deer! Where do you suggest silmics from??

Andrea: · 20th November 2009, 09:45 PM

Anyway my integrated amp has a NJM4570 and I don't dare to replace it, for fear of losing the fine tonal character it has.

nad · 20th November 2009, 09:50 PM

Any 'cheaper' alternatives to Silmics??

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20th November 2009, 09:06 PM	#122
nad diyAudio Member Join Date: Oct 2009	Where to buy Elna Silmics???? Need 10 x 10uf 50v and 8 x 47uf 25v

20th November 2009, 09:20 PM	#123
Andrea: Banned Join Date: Oct 2009	Wait, you said the sound is bright? Meaning that of the CD player? Didn't you use the LME49720HA there? Where did you put the LM4562? Sorry, didn't have the patience to read all posts. Anyway the LME49720HA can be bright per se..

20th November 2009, 09:45 PM	#129
Andrea: Banned Join Date: Oct 2009	Anyway my integrated amp has a NJM4570 and I don't dare to replace it, for fear of losing the fine tonal character it has.

20th November 2009, 09:50 PM	#130
nad diyAudio Member Join Date: Oct 2009	Any 'cheaper' alternatives to Silmics??

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