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Old 17th March 2012, 04:09 PM   #21
pinkmouse is offline pinkmouse  Europe
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New Doug Self pre-amp design...
Dirk, I can guarantee just about every piece of music you have ever listened to has passed though a dozen or more 5532s. They are very, very common in even high end recording kit.
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Old 17th March 2012, 04:09 PM   #22
nickds1 is offline nickds1  England
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Originally Posted by dirkwright View Post
Oh brother, what ever. If you want tone controls and a million chips in your preamp, then please, go for it. If you think this is real engineering, please, go right ahead with your belief. I don't care about this little project, I'm not ever going to build it, and I don't care about anyone's justifications for it. You misunderstand. I don't have any complaints because I don't give a hoot about this project. Can you hear me now? I don't care about it!
For someone who doesn't "give a hoot" about this project you certainly write a lot about it
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Old 17th March 2012, 04:17 PM   #23
Juergen Knoop is offline Juergen Knoop  Germany
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Originally Posted by nickds1 View Post
Just a heads-up...

This month's (UK) Elektor (April 2012, dropped on the mat this morning...)
Specifications
Crosstalk R to L 98 dB (1 kHz)
74 dB (20 kHz)
L to R 102 dB (1 kHz)
80 dB (20 kHz)
here too (German edition)...what do you make of the asymmetric crosstalk numbers? A grounding issue within the 'high quality' board developed by 'Elektor Labs' or a measurement flaw?
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Old 17th March 2012, 04:21 PM   #24
a.wayne is offline a.wayne  United States
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Originally Posted by dirkwright View Post
Oh brother, what ever. If you want tone controls and a million chips in your preamp, then please, go for it. If you think this is real engineering, please, go right ahead with your belief. I don't care about this little project, I'm not ever going to build it, and I don't care about anyone's justifications for it. You misunderstand. I don't have any complaints because I don't give a hoot about this project. Can you hear me now? I don't care about it!
Woaaa...........
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Old 17th March 2012, 04:30 PM   #25
TheShaman is offline TheShaman  Europe
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Originally Posted by pinkmouse View Post
Dirk, I can guarantee just about every piece of music you have ever listened to has passed though a dozen or more 5532s. They are very, very common in even high end recording kit.
Or, to quote Mr.Self from his active crossovers book:

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With tiresome inevitability, the very popularity and excellent technical performance of the 5532 has led to it being savagely criticised by Subjectivists who have contrived to convince themselves that they can tell opamps apart by listening to music played through them. This always draws a hollow laugh from me, as there is probably no music on the planet that has not passed through a hundred or more 5532s on its way to the consumer.
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Old 17th March 2012, 04:46 PM   #26
pinkmouse is offline pinkmouse  Europe
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New Doug Self pre-amp design...
I stand corrected!
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Old 17th March 2012, 04:48 PM   #27
abraxalito is offline abraxalito  United Kingdom
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His laugh must be hollow because his logic is flawed - the 'Subjectivists' he creates are a figment of his own imagination
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Old 17th March 2012, 05:06 PM   #28
analog_sa is offline analog_sa  Europe
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Quote:
Originally Posted by dirkwright View Post
You misunderstand.

It is you who doesn't understand. D Self is like a god here. Only more senior.

Some day, when utter boredom and senility take over i'll build a design of his. With only audiophile approved parts. Maybe even write a subjective review. And then i'll test if lightning strikes.
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Old 17th March 2012, 08:54 PM   #29
jan.didden is offline jan.didden  Europe
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Originally Posted by TheShaman View Post
I'm sure Douglas Self is aware of the alternatives (and "aware" is an understatement in this context).
Actually, in the article he makes a case why he uses the devices he uses. The article is very much to the point for anyone interested in 'opamp rolling', even if you're not interested in a preamp.
The rationale why he uses several of these devices in parallel rather than singles of the 'hi end' devices seems logical as well.

jan didden
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Old 17th March 2012, 08:57 PM   #30
jan.didden is offline jan.didden  Europe
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Originally Posted by dirkwright View Post
Well, I didn't know cost was an important consideration. The price of the chips is a small fraction of the total cost of a project. The pretty box is usually far more expensive, as is the power supply.

Your hint wasn't very clear to me at all.

The NE5532 has twice the noise of say a LME49720. When you have so many chips, noise should be a primary consideration in my opinion.
... so with 4 parallel NE's you're at 6dB less noise than an LME at 1/4 the price. Seems a good deal to me.

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