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Old 4th March 2003, 08:51 AM   #1
aiwonsi is offline aiwonsi  Thailand
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Default best opamp for you [surway]

what is your best opamp?
reason?


it important for my study,please

aiwonsi
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Old 4th March 2003, 08:57 AM   #2
Mad_K is offline Mad_K  Norway
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OPA637BP, -best I've heard sofar.
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Old 4th March 2003, 09:26 AM   #3
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OPA627BP and OPA637BP, neutral and not typical opampstyle soundquality. But expensive...
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Old 4th March 2003, 09:41 AM   #4
Electrons are yellow and more is better!
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AD8610 and AD8620 are coming strong.

OPA627/37 is also a very good choice but I think OPA134 is the most price worthy right know but most hifi for the money is still NE5534, 30-40 cents!

I think AD8610 looks very interesting. I have already got samples and I can't wait to test it in my SMD headphone amp.

http://www.diyaudio.com/forums/showt...805#post137805

AD8610 in a straight forward application
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Old 4th March 2003, 10:37 AM   #5
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There is no way to say "best" without qualifying your criteria. I am not made of money, and although I really like the sound of the OPA627, it is foolish to pay that kind of money for little gain over several very good opamps that are available for a mere fraction of the price (5532/34, 604/2604, et. al.)

Bang-for-the-buck-wise, the OPA604/OPA2604 is tough to beat (especially if you can get a supply voltage of +/-20V or so). If you have deep pockets, buy a 627/637 and fuggetaboutit.
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Old 4th March 2003, 10:48 AM   #6
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OPA 627 / OPA 637

AD825 (smd only)
AD845 (old)

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Old 4th March 2003, 11:32 AM   #7
trwh is offline trwh  United Kingdom
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Hi

For HI-FI the OPA2134 is very good value for money, and sounds excellent. For PA duty the NE5532/4 is just fine.

See ya,
Tim.
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Old 4th March 2003, 12:03 PM   #8
Electrons are yellow and more is better!
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aiwonsi, I think you can get an even more accurate answer if you tell us what you are going to study because the answers will be different especially if you aren't made of money.
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Old 4th March 2003, 01:05 PM   #9
ALW is offline ALW  United Kingdom
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Default Op-amps

Depends a lot upon application, but the following general purpose, high performance devices are good all-rounders.

AD825 - cheap, easily available, stable

AD8610 - Best sound I've heard in my headphone amp

AD8620 - Dual version of above, almost no performance degradation over above, but good thermal tracking, which can be very useful

AD8065 - Very fast, and well behaved device, exceptionally good for driving high capacitance

THS4271 - very fast, ultra low noise, narrow supply range
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Old 4th March 2003, 03:04 PM   #10
SY is offline SY  United States
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That's a useless question; it's like asking, "What is the best car?" If you want to haul around a couple of kids, you'll have a different answer than someone who wants to get around a track as fast as possible.

You have to specify what you're going to use the op-amp for in order to select a "best" one. It's a basic rule of engineering, but one I see ignored a lot: The first step is to define the problem.
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