The best sounding audio integrated opamps - Page 169

Mooly · 9th February 2010, 11:55 AM

Quote:

Originally Posted by peranders

Just a reflexion: Andrea talked about taste and replacing opamps. This is like talking about how good "surströmming" is to a person that either haven't tasted it nor will.

BTW: Surströmming is yummie, once a year at least

Surströmming - Wikipedia, the free encyclopedia
Surstromming--One of the World's Strangest Dishes
Surstrmming - fermented Baltic herring

I imagine that is something you would have to experience.

QSerraTico_Tico · 9th February 2010, 03:08 PM

Quote:

Originally Posted by peranders

Just a reflexion: Andrea talked about taste and replacing opamps. This is like talking about how good "surströmming" is to a person that either haven't tasted it nor will.

BTW: Surströmming is yummie, once a year at least

Surströmming - Wikipedia, the free encyclopedia
Surstromming--One of the World's Strangest Dishes
Surstrmming - fermented Baltic herring

Bork, bork, bork, bork

nickbyte · 16th March 2010, 02:25 PM

Sorry. I m not an expert. Can i ask to you ?
i have two opamp RC4588 in my Denon CD, can i use two LME49860 in upgrade ?
Need a different scheme around it ?

prairiemystic · 26th March 2010, 10:52 PM

Just a reminder to everyone, the Texas Instruments NE5534 and NE5532 are ABSOLUTE GARBAGE

. I have been literally kicked out of the recording studio after doing repairs with these parts. Noisy and trashy sounding at the best.

The proof the TI NE5534 has no relation to the Signetics NE5534 was in a product I worked on a few years ago that broke some rules. The design applied DC/AC to the compensation pins 5, 8 to shift the bias in the op-amp. The TI parts latched up whereas the Signetics parts worked fine.
When I contacted TI engineering, their reply was it's not exactly the same part but it meets the specs and is thus considered equivalent. The original NE5534 used some older IC fabrication techniques that is too expensive to continue.

I haven't tried these other manufacturers:
On-Semi, New Japan Radio NJM5534 (they sounded blah)

Be careful about the manufacturers of these multi-sourced parts.

peranders · 26th March 2010, 11:05 PM

You could actually change the NE5534 to something similar and hopefully better. If the opamps are noisy as you put it, are you sure that the opamps is the cause of that?

geraldfryjr · 28th March 2010, 07:26 AM

I had a similar expirence when I replaced all of the opamps in my fostex 454.
they worked fine in the signal path but turned the filters into vfo's and also some actualy worked in the filter sections but didn't sound consistent per section.
So I just used TL082's thourghout and it sounded way better than original stock.
It was as clean as my mackie 32-8.
Another time i was building a preamp or fuzzbox or something for my giutar or something and it failed miserably.Popped in a trusty TL082 and it worked prefectly with no changes.
After some research I found that it had something to do with bias current and had to be figured into the design, like ,to high of value in the feedback and it won't work at all.
That was 15 years ago and haven't touched one since.
I know there are some nice newer opamps out today,but you beat the old TL series bifets.
I used to cringe every time I'd see a schematic or buy some kind equipment that they would call professional and find a jrc45xx inside.
I got to the point were I could bet you what opamps were being used in it by looking at the spec's and hearing it was a no brainer.
As far as the NE5532 and NE5534 goes i had some that were nice quiet and and most of them were noisey and out of spec.
Very inconsistent.
But the ones that did work sounded great.
I know it sounded contridictory but i had more than just a couple them, as ther was like betwen 40 to 60 chips in that mixer and I bought them in seperate batch's. jer

wwenze · 28th March 2010, 09:12 AM

Would this apply for NJM vs JRC 45xx I wonder?

nad · 28th March 2010, 10:53 PM

2 months away, 169 pages later, OP Andrea banned (good) and it's still going with the same old same old flopamps, go discrete!

soongsc · 29th March 2010, 12:49 AM

Quote:

Originally Posted by nad

... OP Andrea banned (good) ...

How did that happen? He did not seem too bad back then.

Joachim Gerhard · 29th March 2010, 01:18 AM

I only have good experiences with Texas NE5534A and have used quite a few.
The A type has guanranteed noise and offset spec.
As a replacement i use LME49710 also. It even has (slightly) lower distortion and voltage noise but 4 times more current noise so as a bipolar the NE5534A is still special.
If i need higher speed i take the LT1468.
Used correctly the NE5534A is a very neutral amplifier.
Simply swapping OPamps without measurements or optimisation and giving them a absolute ranking is a bit mindless i think.

26th March 2010, 10:52 PM	#1684
prairiemystic diyAudio Member Join Date: Jul 2004 Location: Edmonton, AB Canada	The NE5534 is dead Just a reminder to everyone, the Texas Instruments NE5534 and NE5532 are ABSOLUTE GARBAGE . I have been literally kicked out of the recording studio after doing repairs with these parts. Noisy and trashy sounding at the best. The proof the TI NE5534 has no relation to the Signetics NE5534 was in a product I worked on a few years ago that broke some rules. The design applied DC/AC to the compensation pins 5, 8 to shift the bias in the op-amp. The TI parts latched up whereas the Signetics parts worked fine. When I contacted TI engineering, their reply was it's not exactly the same part but it meets the specs and is thus considered equivalent. The original NE5534 used some older IC fabrication techniques that is too expensive to continue. I haven't tried these other manufacturers: On-Semi, New Japan Radio NJM5534 (they sounded blah) Be careful about the manufacturers of these multi-sourced parts.

26th March 2010, 11:05 PM	#1685
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	You could actually change the NE5534 to something similar and hopefully better. If the opamps are noisy as you put it, are you sure that the opamps is the cause of that? __________________ /Per-Anders (my first name) or P-A as my friends call me

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16th March 2010, 02:25 PM	#1683
nickbyte diyAudio Member Join Date: Dec 2009 Location: Italy	Sorry. I m not an expert. Can i ask to you ? i have two opamp RC4588 in my Denon CD, can i use two LME49860 in upgrade ? Need a different scheme around it ?

28th March 2010, 07:26 AM	#1686
geraldfryjr diyAudio Member Join Date: Feb 2008 Location: Jackson,michigan	I had a similar expirence when I replaced all of the opamps in my fostex 454. they worked fine in the signal path but turned the filters into vfo's and also some actualy worked in the filter sections but didn't sound consistent per section. So I just used TL082's thourghout and it sounded way better than original stock. It was as clean as my mackie 32-8. Another time i was building a preamp or fuzzbox or something for my giutar or something and it failed miserably.Popped in a trusty TL082 and it worked prefectly with no changes. After some research I found that it had something to do with bias current and had to be figured into the design, like ,to high of value in the feedback and it won't work at all. That was 15 years ago and haven't touched one since. I know there are some nice newer opamps out today,but you beat the old TL series bifets. I used to cringe every time I'd see a schematic or buy some kind equipment that they would call professional and find a jrc45xx inside. I got to the point were I could bet you what opamps were being used in it by looking at the spec's and hearing it was a no brainer. As far as the NE5532 and NE5534 goes i had some that were nice quiet and and most of them were noisey and out of spec. Very inconsistent. But the ones that did work sounded great. I know it sounded contridictory but i had more than just a couple them, as ther was like betwen 40 to 60 chips in that mixer and I bought them in seperate batch's. jer

28th March 2010, 09:12 AM	#1687
wwenze diyAudio Member Join Date: Mar 2008	Would this apply for NJM vs JRC 45xx I wonder?

28th March 2010, 10:53 PM	#1688
nad diyAudio Member Join Date: Oct 2009	2 months away, 169 pages later, OP Andrea banned (good) and it's still going with the same old same old flopamps, go discrete!

29th March 2010, 01:18 AM	#1690
Joachim Gerhard diyAudio Member Join Date: Mar 2009	I only have good experiences with Texas NE5534A and have used quite a few. The A type has guanranteed noise and offset spec. As a replacement i use LME49710 also. It even has (slightly) lower distortion and voltage noise but 4 times more current noise so as a bipolar the NE5534A is still special. If i need higher speed i take the LT1468. Used correctly the NE5534A is a very neutral amplifier. Simply swapping OPamps without measurements or optimisation and giving them a absolute ranking is a bit mindless i think.

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