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ULTIMATE OPAMP SHOOTOUT... Where you get to decide.
ULTIMATE OPAMP SHOOTOUT... Where you get to decide.
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View Poll Results: Which opamp do you prefer the sonics of ?
Apple 2 5.00%
Banana 7 17.50%
Damson 1 2.50%
Kiwi 1 2.50%
Orange 6 15.00%
Peach 6 15.00%
Pear 3 7.50%
Pomegranate 11 27.50%
Raison 2 5.00%
Satsuma 1 2.50%
Voters: 40. You may not vote on this poll

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Old 7th November 2013, 03:11 PM   #11
M Gregg is offline M Gregg  England
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Why,

haven't you got a vote on the thread for each one so we can vote for what we think is the best?

I have had a quick listen to the MP3's and it is a quick listen. (laptop permitting )
Some of them are a mess of smear. Some sound very similar.
A few stand out.

Regards
M. Gregg
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Old 7th November 2013, 04:58 PM   #12
Mooly is offline Mooly  United Kingdom
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ULTIMATE OPAMP SHOOTOUT... Where you get to decide.
Great idea Gregg. If I'm honest I've never even looked at setting a poll up before... think its set up right

So ya all get listening and voting
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Old 7th November 2013, 07:22 PM   #13
Mooly is offline Mooly  United Kingdom
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ULTIMATE OPAMP SHOOTOUT... Where you get to decide.
Just spotted we have the first vote. So come on folks, don't be shy
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Old 8th November 2013, 12:12 AM   #14
fas42 is offline fas42  Australia
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Thanks for putting these up, Mooly, I'm very deliberately not looking at anyone's comments until I do a ranking - will work with the WAV files ...

Immediately, without listening seriously, a huge gap between the best and the worst, quite surprising that this should be so - I wonder whether it's the implementation of the pass-through circuit ... I'll be interested in other's comments ...
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Old 8th November 2013, 12:35 AM   #15
Pano is offline Pano  United States
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ULTIMATE OPAMP SHOOTOUT... Where you get to decide.
Thanks for the cool test. I immediately found a wave file that sounds different than all the rest, so I assume it's the original. But Foobar ABX say no - I'm just guessing.
Will do some more listening.
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Old 8th November 2013, 12:50 AM   #16
Jay is offline Jay  Indonesia
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Quote:
Originally Posted by bear View Post
Well, not to parade on anyone's rain... happened across this thread, and was curious.

I'd like to know more about the performance of the circuit itself, and how the files were captured to digital. For example the 47ufd output cap? That alone has the potential for masking differences. The 620ohm load is a *heavy* load for many of the opamps listed. That will effect performance. The quality of the resistors, is the circuit open air? Shielded? What about RFI? Noise floor? Details, details... always a PIA.

Watch, the 741 will win!

_-_-

Yes, I'm sure the result will not be useful to show which opamp is better. But I want to try this with my transparent speaker... I think old opamps such as 471, 4558, 4560 will not win. Must be in the "wild card" or OPA134 which is fast and has dominant second order harmonic content.
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Old 8th November 2013, 02:12 AM   #17
Oliphant is offline Oliphant  New Zealand
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Once the big reveal has occurred can we please see some waveforms for each?
A 20kHz square wave would be great just to see if there is any difference in stability.
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Old 8th November 2013, 06:13 AM   #18
Mooly is offline Mooly  United Kingdom
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ULTIMATE OPAMP SHOOTOUT... Where you get to decide.
Quote:
Originally Posted by Pano View Post
Thanks for the cool test. I immediately found a wave file that sounds different than all the rest, so I assume it's the original. But Foobar ABX say no - I'm just guessing.
Will do some more listening.
Its fun isn't it All the files seem to stand up well to critical listening, even via really good cans.
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Old 8th November 2013, 06:22 AM   #19
Mooly is offline Mooly  United Kingdom
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ULTIMATE OPAMP SHOOTOUT... Where you get to decide.
Quote:
Originally Posted by Jay View Post
Yes, I'm sure the result will not be useful to show which opamp is better. But I want to try this with my transparent speaker... I think old opamps such as 471, 4558, 4560 will not win. Must be in the "wild card" or OPA134 which is fast and has dominant second order harmonic content.
And the 741 and 4558 and 4560 really are old in the real sense too. They are not "modern" offerings but devices of 30+ yrs ago. The 4558's were from an old Sony C9 Betamax and the 741's from when I first started out in electronics. 4560's were really popular in rack and midi systems of the 80's and 90's.

I was wondering about another poll in a separate "closed thread" where you could all vote for the worst sounding one too.
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Old 8th November 2013, 06:24 AM   #20
Mooly is offline Mooly  United Kingdom
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ULTIMATE OPAMP SHOOTOUT... Where you get to decide.
Quote:
Originally Posted by Oliphant View Post
Once the big reveal has occurred can we please see some waveforms for each?
A 20kHz square wave would be great just to see if there is any difference in stability.
There would certainly be big differences in rise times between the 741 in particular compared with the others.
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