OPA4134 x TL074 - Sound Differences - diyAudio
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Old 12th February 2007, 07:30 PM   #1
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Question OPA4134 x TL074 - Sound Differences

Hello!

As everybody knows, the OPA4134 is a pretty expensive Opamp, and the TL074 is very cheap.

I was reading de datasheet of the TL074, and I found that it's slew rate is 13v/s, pretty good if you compare to a poor RC4558 that is 1.7v/s...

The Opa4134 have a slew rate of 20v/s...

Both are J-FET inputs too !

So, I'd like to ask you listeners, the diference between OPA4134 and TL074 is that big, or just a thing that you can barely perceive?

I'll not drive any low impedance with the opamps.


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Old 12th February 2007, 07:56 PM   #2
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Would be nice to consider the LM837 too !
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Old 12th February 2007, 08:36 PM   #3
BWRX is offline BWRX  United States
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When used in a buffer application I think the TL072 sounds more laid back, perhaps a tad too smooth. The OPA2134 sounds more precise and neutral. Both are good opamps for the price, and I prefer either of them over the NE5532. The difference between them certainly isn't staggering, especially when used at unity gain into a higher impedance load (>1kohm).
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Old 12th February 2007, 09:29 PM   #4
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So I'll make it hybrid.

For every buffer, I'll use TL074, and for every gain block I'll use Opa4134. What you think?

Thank you BWRX !


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Old 12th February 2007, 09:38 PM   #5
BWRX is offline BWRX  United States
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These opamps are reasonably cheap so why not get extras and some sockets and swap them out to see what you like best? I'm sure you could find some way to put any extras to good use
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Old 13th February 2007, 12:59 AM   #6
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Sure !

But unfortunately the OPA4134 is not avaliable in DIP package
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Old 13th February 2007, 02:54 AM   #7
Leolabs is offline Leolabs  Malaysia
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Believe it or not,some hi-end manufacturers still stick with the TLO7x series as their preamp or poweramp driver.
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Old 13th February 2007, 04:01 AM   #8
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Nice !
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Old 13th February 2007, 02:25 PM   #9
Cobra2 is offline Cobra2  Norway
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You can get the OPA4228/OPA4227 in DIP


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Old 13th February 2007, 04:14 PM   #10
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But it costs two times the 4134.

4134 costs R$12 for me, and 4227/4228 costs R$28.

Any alternatives?


Thanks !!
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