6SN7/6SN7 Aikido + CS4398 DAC = HEAVEN - Page 2

gabrielbecheanu · 29th December 2009, 10:06 PM

I check and see that OPA1612 is only a SMD version. To use it we need an adapter.

Andrea: · 29th December 2009, 10:09 PM

Quote:

Originally Posted by gabrielbecheanu

I check and see that OPA1612 is only a SMD version. To use it we need an adapter.

Yes...it's worth it! My absolute favorites with the CS4398 have been: OPA1611, LT1028ACN8, and LME49720HA. In other words, the most genuinely transparent (though each different from the others) opamps that I've tried so far.

john65b · 30th December 2009, 12:11 AM

Andrea,

I have the following OPAMPS in front of me, and more around here somewhere...(some are garbage/singles or combination of both)

TL072CP
RC4558N
OPA627AU
LM6172IN
OPA2134PA
LME49710NA
OPA2227PA
LT1364
NE5532N
LM4562

The LM4562 is my favorite so far...

Gabriel, I will try and download the Sony Test CD and get that aoutput voltage to you...

Andrea: · 30th December 2009, 08:41 AM

I'm not surprised...and as I said the LM4562 goes well with the CS4398.

That said, personally I wasn't satisfied with the LM4562NA. I really preferred the LME49720HA to it, that's why I suggested that you try the LM4562HA.

cjkpkg · 6th January 2010, 01:08 PM

What kind of B+ are you running and what are specifics on your PSU?

Thanks!

adamus · 6th January 2010, 01:25 PM

why not tranformer couple. I used sowters. all opamps removed.

Andrea: · 6th January 2010, 01:32 PM

Why ten times more distortion (if not more) would be so desirable?

With opamps, it depends on the opamps...really.

Andrea: · 6th January 2010, 01:34 PM

In this kit I'd also bypass the 4 green Nichicon Muse between DAC and opamp with something like Wima .1uF 250V MKS4, for instance (for size).

eherdian · 10th January 2010, 02:39 PM

I did change LM4562NA with LM4562HA (metal can) last week, the sound seems better than 4562NA but I haven't check that further since my maggie loudspeaker hitted by DC current comes from my friend stuppid tube pre-amp..
1 thing I noticed is 4562HA run much hotter than 4562NA so I have to put cooling fin around the 4562HA

Andrea: · 10th January 2010, 03:13 PM

Quote:

Originally Posted by eherdian

I did change LM4562NA with LM4562HA (metal can) last week, the sound seems better than 4562NA but I haven't check that further since my maggie loudspeaker hitted by DC current comes from my friend stuppid tube pre-amp..
1 thing I noticed is 4562HA run much hotter than 4562NA so I have to put cooling fin around the 4562HA

10 mA of total supply current is the same for both chips. Did you plug them correctly, i.e. soldered on some TO99 to DIP adapters (like from Browndog)?

30th December 2009, 12:11 AM	#13
john65b diyAudio Member Join Date: Jan 2005 Location: Chicago	Andrea, I have the following OPAMPS in front of me, and more around here somewhere...(some are garbage/singles or combination of both) TL072CP RC4558N OPA627AU LM6172IN OPA2134PA LME49710NA OPA2227PA LT1364 NE5532N LM4562 The LM4562 is my favorite so far... Gabriel, I will try and download the Sony Test CD and get that aoutput voltage to you... __________________ All right, but apart from the sanitation, medicine, education, wine, public order, irrigation, roads, the fresh water system and public health, what have the Romans ever done for us? Life of Brian

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29th December 2009, 10:06 PM	#11
gabrielbecheanu diyAudio Member Join Date: Jun 2006 Location: Constanta	I check and see that OPA1612 is only a SMD version. To use it we need an adapter.

30th December 2009, 08:41 AM	#14
Andrea: Banned Join Date: Oct 2009	I'm not surprised...and as I said the LM4562 goes well with the CS4398. That said, personally I wasn't satisfied with the LM4562NA. I really preferred the LME49720HA to it, that's why I suggested that you try the LM4562HA.

6th January 2010, 01:08 PM	#15
cjkpkg diyAudio Member Join Date: Aug 2008 Location: Roswell GA	What kind of B+ are you running and what are specifics on your PSU? Thanks!

6th January 2010, 01:25 PM	#16
adamus diyAudio Member Join Date: Apr 2008	why not tranformer couple. I used sowters. all opamps removed.

6th January 2010, 01:32 PM	#17
Andrea: Banned Join Date: Oct 2009	Why ten times more distortion (if not more) would be so desirable? With opamps, it depends on the opamps...really.

6th January 2010, 01:34 PM	#18
Andrea: Banned Join Date: Oct 2009	In this kit I'd also bypass the 4 green Nichicon Muse between DAC and opamp with something like Wima .1uF 250V MKS4, for instance (for size).

10th January 2010, 02:39 PM	#19
eherdian diyAudio Member Join Date: Oct 2009 Location: Java	I did change LM4562NA with LM4562HA (metal can) last week, the sound seems better than 4562NA but I haven't check that further since my maggie loudspeaker hitted by DC current comes from my friend stuppid tube pre-amp.. 1 thing I noticed is 4562HA run much hotter than 4562NA so I have to put cooling fin around the 4562HA