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A good review of the OPA2132 IMO (not mine}

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Posted on December 30, 2016 at 14:20:55
Tweaker456
Audiophile

Posts: 2150
Location: No. Cal
Joined: January 19, 2012

"OPA 2132 Smooth, highly analytical, warm, uncoloured, laid back yet all detail is present (and then some) Very electrostatic quality to the sound with that super solid state bass underpinning the proceedings without overwhelming them. Start and stops are followed by an inky black silence and the timbre of the drums is very realistic indeed. Something that is very evident with this op amp is it's inherent ability to provide accurate timing which I really do like! There is no bass overhang, the drums start and stop as they should and, as a result, the timing is pretty much spot on. This is like listening to music with a stethoscope with the metronome ticking away in the background but it also adds a touch of valium to make the experience very bearable and extremely enjoyable." Arnold B. Krueger This is the op amp that made me stop rolling. T456

"The Borg is the ultimate user. They're unlike any threat your Federation has ever faced."

- Q, 2365

 

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Rain on the parade, posted on January 1, 2017 at 18:27:01
bobwire
Audiophile

Posts: 331
Joined: March 7, 2002
I used these op-amps in my Sony NS9000 and Classe'534 pre-amp. Both of those units were highly modded. New caps, low temp-co resistors all matched. The biggest change was adding 6800uf to the power pins of each IC op-amp. Sockets let me change out op-amps easy. I had a lot of op-amps to try in those days, one was the OPA-2132. With the power mods they have no sound of their own except for a dark character to the over all sound. They seem fast, with the highs you want and tight bass, but still dark. I replaced them with LM4562's and thought that I had reached Navona. The sound was brighter, like someone had turned on the lights. Now, I could see into the music and the way to the back. I have gone on to change all op-amps in my system to LM's, including my Emovita DAC and Classe' Ten power amps. These both have major power supply mods. I no longer use an analog pre-amp, as my system is all digital inputs now. Like I said, the opa's are OK, but the LM's will blow them away. Good Luck, bobwire

 

RE: Rain on the parade, posted on January 3, 2017 at 11:19:24
Hornlover
Manufacturer

Posts: 2086
Joined: March 8, 2002
I prefer the LM4562's also. Hard to beat for audio use.

 

RE: Rain on the parade, posted on January 3, 2017 at 12:26:09
AbeCollins
Audiophile

Posts: 27701
Location: USA
Joined: June 22, 2001
Contributor
  Since:
February 2, 2002

The biggest change was adding 6800uf to the power pins of each IC op-amp.

I'd be curious to know how you arrived at 6800uF as the ideal value for placement right at the opamp -V & +V pins. Thanks.



 

RE: Rain on the parade, posted on January 3, 2017 at 20:02:06
bobwire
Audiophile

Posts: 331
Joined: March 7, 2002
It was by modding a lot of gear. I would always do a power supply up-grade of all the PS caps. Most times I would make them x10 bigger. So, 220uf want to 2200uf. This would almost always make a difference. And I would put 1000-2200uf right on the op-amp power pins. Then one day I realized that I was doing the right thing but to small. I then tried 4700uf on the op-amps and it was good, but not always. The magic would come and go. So, I tried 6800uf and the magic stayed. Even op-amps as old as the 5532 would be smooth, detailed and would seem to disappear, not have a sound that said OP_AMP. Trust your ears. Good Luck, bobwire

 

RE: Rain on the parade, posted on January 3, 2017 at 22:44:46
AbeCollins
Audiophile

Posts: 27701
Location: USA
Joined: June 22, 2001
Contributor
  Since:
February 2, 2002


If you believe in magic, who am I to question your method? ;-)



 

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