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In Reply to: RE: Try it and let us know! nt. posted by Cougar on May 18, 2016 at 19:30:53
Have you heard it yet?? Since I don't have a scope I could put it in, fire it up for awhile to see if it gets hot, than turn on the amp at low volume. Any thoughts on that methodology to prevent a disaster if it oscillates?? There are those who think the Difets are the best. Then there are those who think signet NE5532 are the best. This "should" beat the 2604. T
Follow Ups:
you to get a cheap scope if you are going to do tweaking on gear. You can't always depend on what others say. I did a few tweaks that other's in other forums/posts that said a certain IC would work and found out with using a scope that the part/circuit would cause oscillation. The only way I could have known was with a scope.Sometimes when you have oscillation the part gets hot and or sounds bright/harsh. Ringing (bad) is only found with a scope.
Depending on the application and circuit it's hard to say if a certain part will BEAT another part but the OPA 2604 is a good sounding IC for a good price. The part you are asking about may just sound different but not necessarily better. Let your own ears be the judge of what sounds best in your system. Soon I will have to try that part out and see for myself how it sounds/compares to the OPA-2604.
The OPA-2134 is not bad once you find the trick to tame the slight harshness it has. I have some in my DIY preamp cause I couldn't use the OPA-2604 at the time due to oscillation in that circuit. I'm happy with the sound of that preamp now that I have cured that harshness it had and it's right there with some very expensive preamps in sound. Even a buddy of mine that has a nice system was shocked at how good that DIY preamp sounds compared to the expensive ones I have/had.
Edits: 05/18/16
Well Cougar, I just dropped in a OPA2134. It's not broken in at all. I am extremely impressed by it so far. From memory since I haven't had the 2604 in for a while I would say that the 2134 blows it away in terms of bass quality, impact focus and maybe depth. Voices are superb. The size and warmth is there without what may be a somewhat excessive low mid emphasis in the 2604. This op amp, 2134, is very forward and in your face, IMHO, just the way I like it. When I first heard Miles come in on a solo on my test song I thought I could hear a fatter brass sound than the 2604. So far the down side is maybe a bit extra buzzing type distortion on his horn. Maybe just a touch of peaky type glare. The 2604 smoother, less in your face and I would say somewhat "hi fiish" sounding in comparison, if that means anything. These two op amps are in my ballpark.
then you can compare.
What's the trick to tame the OPA2134 slight harshness?
Dark energy? Ridiculous!
We live in an electric universe.
Edits: 05/19/16
It came down to PS and the right combo of bypassing caps on the -/+ pins.
Yo Cougar, Please let us know what you found the right combo of -V to +V was to tame the OPA2134. Thanks, Tweaker
I have the dual 2134 in my Pioneer D 9 SACD player. I'm thinking of changing out the 2134 with Burson audio V5. Any experience with the Burson pampas?
I use an early Burson 'opamp' in last slot in my Bugle2 and it is an appreciable difference. Sound is more open, cleaner, wider, etc. I have read of a newer v5i version which I will step up to soon.
This version is cheaper than previous version, is smaller, and did I say cheaper.
Where do you order it and how much? I went to retailers and then checked three and none had the opportunity amps. Upscale, Parts Connexion and Audio Advisor.
ET
go to the link below and then go to close to the bottom of the page.
There are options for ordering there.
And then I will send it off to Bill Thalman to install. I assume the 2134 is soldered in?
Thanks
AL
on my Bugle2 the opamp was soldered in. as your guy to put a dip slot in vs soldering in the new chips. that way you can upgrade in the future and you apply no damaging heat to the new op amps.
Good advice-I will do that.
Thanks
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