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Old 8th June 2010, 09:23 AM   #1
Galgo is offline Galgo  Israel
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Default Direct upgrade for JRC NE5532 ?

Greetings,

I'm experimenting with few amp. designs and one of the boards I ordered (based on TI Tas5613) use two JRC NE5532 opa.
Originally we intend to upgrade it with opa2353, but apparently it wouldn't work due to this op using single 5v power supply.

Any other direct replacement with better performances?

I'm trying to optimize my build for better sound reproduction and would hate to have components notoriously known for distorting data.

Any other information needed to decide on the replacement?

I might also experiment with some TUBE buffers - maybe I can use a TUBE stage instead of these opa ?

Regards,
Gal
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Old 8th June 2010, 09:32 AM   #2
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Try to use BB OPA2604 or NS LM4562.
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Old 9th June 2010, 07:32 AM   #3
Galgo is offline Galgo  Israel
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How about NJM2114 ?
Much better than JRC NE5532?
Gal
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Old 9th June 2010, 07:41 AM   #4
Mooly is offline Mooly  United Kingdom
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OPA2604 is still one of my favourites...

have you used the search function
The best sounding audio integrated opamps
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Old 9th June 2010, 07:44 AM   #5
Mooly is offline Mooly  United Kingdom
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And OPA2604,
The best sounding audio integrated opamps
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Old 9th June 2010, 07:49 AM   #6
Galgo is offline Galgo  Israel
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Quote:
Originally Posted by Mooly View Post
OPA2604 is still one of my favourites...

have you used the search function
The best sounding audio integrated opamps
Great link - thank you
It's just that I'm limited by the PCB maker inventory.
The board originally had two NE5532 and we agreed on upgrading with opa2353 but he had problems fitting it w/o further modification to the PCB power lines.
The only other option he currently offer is NJM2114.
Other than that I'll have to modify it myself when I'll get it.
I'm newbie and even though have decent soldering skills - I'm not sure I have the knowledge to do any other MOD than just direct replacing the OP IC's.
So only a direct replacement is preferable w/o any other modification...

Would the OPA2604 fit directly? same power requirements as NJM2114 etc?
Gal
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Old 9th June 2010, 07:52 AM   #7
Galgo is offline Galgo  Israel
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BTW - can I bypass the OPA output stage completely?
Can I hook some kind of TUBE stage instead or something similar (I like TUBE sound a lot) ?
Any suitable DIY kit you can recommend?
Gal
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Old 9th June 2010, 08:05 AM   #8
Mooly is offline Mooly  United Kingdom
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The OPA2604 will replace a 2114.

http://www.datasheetcatalog.org/data...io/ae04028.pdf
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Old 9th June 2010, 08:07 AM   #9
Mooly is offline Mooly  United Kingdom
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Quote:
Originally Posted by Galgo View Post
Can I hook some kind of TUBE stage instead or something similar (I like TUBE sound a lot) ?
Gal
This is why the OPA2604 is so good... the distortion spectrum has even harmonics predominating.

If you can post the circuit diagram we would have more of an idea what you are trying to replace.
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Old 9th June 2010, 12:11 PM   #10
gk7 is offline gk7
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Attached are spectra from an OPA2604 and a LM4562 I have tested in my DAT recorder (gain of 10 or so I believe). The LM4562 has higher 2nd harmonic (if that is what you wan´t) but higher 5th too. At least it lacks the
unfavorable 7th which the OPA2604 has. No integrated opamp will give you
"tube sound". I cannot confirm that the OPA2604 has predominantly even harmonics (at least not in the sense as a single ended class a circuit would have).
Attached Images
File Type: png dat_bb2604.png (17.1 KB, 378 views)
File Type: png dat_lm4562.png (17.5 KB, 365 views)
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