Good replacment for BB OPA 2604/604 - Page 2

Nuuk · 19th November 2004, 10:17 PM

Quote:

Would you trade those for some "hand-selected" JRC op-amps?

Cobra2 · 19th November 2004, 10:40 PM

Quote:

Originally posted by carlosfm

Would you trade those for some "hand-selected" JRC op-amps?

Already have a bunch of them too...(strangely, most of them have been used...)

Arne K

carlosfm · 19th November 2004, 11:00 PM

Quote:

Originally posted by Cobra2
Already have a bunch of them too...(strangely, most of them have been used...)

Arne K

hollow_man · 19th December 2004, 06:56 PM

The opa604? Definately not the op-amp for hi-end sound. Had great expectations initially, but compared even to devices like the AD847 it sounds artificial and closed-in. Nope, not for me, thanks.

Brad-Man · 27th January 2005, 11:25 PM

I heard from Norbert Lehman that the new op-amp in the revised Black Cube Phono amp was a BB OPA 2604. The original BC used an AD OP275.

Would the 132 be better here too?

Thanks

carlosfm · 28th January 2005, 04:45 AM

Quote:

Originally posted by Brad-Man
I heard from Norbert Lehman that the new op-amp in the revised Black Cube Phono amp was a BB OPA 2604. The original BC used an AD OP275.

The OPA2604 sounds better than the OP275.

Quote:

Originally posted by Brad-Man
Would the 132 be better here too?

Yes.

Gaucho · 11th February 2005, 11:38 PM

The 2132 (P version) is fat/wooly sounding, but it's still a little better then the 2134AP. Perhaps some like the 2132 because it fattens the rather lean/bright sound of their system. It certainly won't make anyone's ears bleed, that's for sure.

I would like to hear some opinions of the 8620.

carlosfm · 11th February 2005, 11:51 PM

Quote:

Originally posted by Gaucho
The 2132 (P version) is fat/wooly sounding, but it's still a little better then the 2134AP.

No it's not.
You just don't know how to use it.
And yes, I KNOW what you're talking about. You've hit the spot.
Hint: PSU bypass.

Quote:

Originally posted by Gaucho
I would like to hear some opinions of the 8620.

The OPA2132 is much better.

ericpeters · 12th February 2005, 12:08 AM

Hey Carlos,

I know it matters where to put the bypass, but how important is the quality/size of the cap used?

I just used what I had laying around, and it improved my project dramatically. I'm now wondering if a high quality/right size cap will even improve that.

carlosfm · 12th February 2005, 12:17 AM

Quote:

Originally posted by ericpeters
I'm now wondering if a high quality/right size cap will even improve that.

It does.
Search this forum and you'll find my hundreds (thousands?) of posts about that.

I suppose it's easy to find.

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19th December 2004, 06:56 PM	#14
hollow_man diyAudio Member Join Date: Nov 2004 Location: Athens	The opa604? Definately not the op-amp for hi-end sound. Had great expectations initially, but compared even to devices like the AD847 it sounds artificial and closed-in. Nope, not for me, thanks.

27th January 2005, 11:25 PM	#15
Brad-Man diyAudio Member Join Date: Jan 2005 Location: Marietta, GA	I heard from Norbert Lehman that the new op-amp in the revised Black Cube Phono amp was a BB OPA 2604. The original BC used an AD OP275. Would the 132 be better here too? Thanks

11th February 2005, 11:38 PM	#17
Gaucho diyAudio Member Join Date: Mar 2004 Location: Stuck in the 80's	The 2132 (P version) is fat/wooly sounding, but it's still a little better then the 2134AP. Perhaps some like the 2132 because it fattens the rather lean/bright sound of their system. It certainly won't make anyone's ears bleed, that's for sure. I would like to hear some opinions of the 8620.

12th February 2005, 12:08 AM	#19
ericpeters diyAudio Member Join Date: Apr 2004 Location: Deep South	Hey Carlos, I know it matters where to put the bypass, but how important is the quality/size of the cap used? I just used what I had laying around, and it improved my project dramatically. I'm now wondering if a high quality/right size cap will even improve that.

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