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-   -   NE5532 or OPA2134 (http://www.diyaudio.com/forums/chip-amps/102753-ne5532-opa2134.html)

wandelblu 30th May 2007 01:50 PM

NE5532 or OPA2134
 
Hi!

I have a cd player SONY XA2-ES, It has four opamp NE5532, I'm thinking to change them with OPA2134.

Is it really a good sound improvement?

Can you give me some advices?


Best Regards.
Enzo

CJ900RR 30th May 2007 02:31 PM

Its only your own personal impression that can deside witch one is the best sounding. Compare them both and then make your own desission, its not so much money.

Thats the best advice I can give you.

richie00boy 30th May 2007 02:44 PM

They are both comparable chips, both good sounding. I don't think you'll notice much if any difference.

Minion 30th May 2007 05:08 PM

The NE5532 is a Bipolar Input opamp and the OPA2134 is a Fet Input opamp so depending on what the Opamp is doing in the curcuit the OPA2134 may or might not be a suitable replacement....

I would maybe look into other Bipolar input opamps with simular specs for a replacement or maybe post the schematic of the unit....


;)

Keruskerfuerst 30th May 2007 09:42 PM

A good choice would be:

Analog Devices AD 8620, but the recommended supply voltage is +-12V.

Texas Instruments THS4032.

Both are bipolar input OPs.

lineup 30th May 2007 10:30 PM

Quote:

Originally posted by Minion

The NE5532 is a Bipolar Input opamp and the OPA2134 is a Fet

Input opamp so depending on what the Opamp is doing in the curcuit
the OPA2134 may or might not be a suitable replacement....

I would maybe look into other Bipolar input opamps with simular specs for a replacement or maybe post the schematic of the unit....

;)

Hello, Wandelblu, Minon.

If the orginal OP is a FET (like TL072, OPA2134 etc)
we may be careful
sometimes NOT possible to replace with Bipolar (like NE5532 etc).

When the original OP is Bipolar(like NE5532 etc)
we can most always
replace with FET or another similar Bipolar OP.

Another way to say it:
JFET OPamps like OPA2134 can replace most any other audio opamp.
Bipolar or not.



Now there are both Bipolar and JFET OPs of many types.
So there is no 100% garantee it will work
But if unsure, it is good to ask, as been done in this topic.
We are many that could make a very good guess
especially if we can see schematic of actual circuit.


If you want to keep it Bipolar and upgrade to a 'better'
you may want have a look at:
OP275 ---> http://www.analog.com/UploadedFiles/...eets/OP275.pdf
LM833 ---> http://www.onsemi.com/pub/Collateral/LM833-D.PDF



My advice, still:
Go for OPA2134 :cool:
- it gives great audio value for money
- easy to find and buy - wherever on Earth (except Antartics :D )
- it has been proven to work well and be stable in most any audio circuit
- without doubt the most used and loved op-amp in diy audio

As being a Dual OP-Amp with JFET input transistors,
it can, in 90% of all cases, replace BOTH Bipolar type and other JFETs.
Without any issues :cool:


Regards
lineup
:)

! 30th May 2007 10:58 PM

Quote:

Originally posted by Keruskerfuerst
A good choice would be:

Analog Devices AD 8620, but the recommended supply voltage is +-12V.

Texas Instruments THS4032.

Both are bipolar input OPs.

AD8620 is JFET not bipolar input.

I agree with the prior post that normally a JFET can replace the prior bipolar, but why the focus on only these two? THS4032 might work but is probably harder to keep stable and it's higher output current capability is unnecessary.

The general character of OPA2132 is slow, semi-smooth and mellow tubby sound. What is the supply voltage for this opamp? That might narrow the possible candidates unless you were to modify more of the circuit to raise voltage some.

Whether these are SOIC or DIP(8?) might matter as well, limiting choices.

How many *need* replaced at what is the budget for it? Many like OPA2107 but it does cost 4X as much, is possibly a more detailed cousin of OPA2132. AD8620 is also a good candidate, a little livelier, less laid-back sound.

rabbitz 31st May 2007 09:58 AM

Re: NE5532 or OPA2134
 
Quote:

Originally posted by wandelblu
I have a cd player SONY XA2-ES, It has four opamp NE5532, I'm thinking to change them with OPA2134.

I've been through this on a Sony CDP-X55ES and changing the 4 opamps to 2134 did not sound as good (became very shouty and over blown) as leaving the first 2 as 5532's and only changing the last 2 to 2134's.

Best results (by a mile) came from changing the last 2 opamps to AD825.

BTW, the output caps after the opamps were changed to Black Gate NX and have also had success with Nichicon ES.

Keruskerfuerst 31st May 2007 02:55 PM

In case of FET-input opamps, the source impedance has to be <=2KOhm. Otherwise distortion will rise.

Bipolar opamps do not have this restrition. But they have a much higher input bias current.

ctong 31st May 2007 10:03 PM

I changed the opamps in my sony scd-c555es to 2132 and it sounds great. 2134 is not good at all. I use pass aleph pre, adcom amp, and b&w n803 speakers.


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