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Old 6th July 2004, 05:39 PM   #1
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Default Mark Levinson 380S

Does anyone know what is the opamp being used in this preamp? Thanks
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Old 6th July 2004, 08:48 PM   #2
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I have been told it was a Burr Brown 604.
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Old 6th July 2004, 09:06 PM   #3
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604 ? I can't belive, that this " superfirm " should to use this not so much good circuit .
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Old 6th July 2004, 11:19 PM   #4
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I've played with 604's and 2604's and I've seen worse.

Considering that they're running their volume control through
a monolithic multiplier, what op amp do you think would measure
up to the job?
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Old 7th July 2004, 01:04 AM   #5
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Quote:
Originally posted by Nelson Pass
2604's
Those were used in the 38S version. I believe 380 version is using different chips (you can find OPA627 in ML32), although also from BB.

They use AD823 for I/V conversion (after the volume DAC) and discreet output buffers (MAT02EH and MAT03EH)

That said, OPA2604 sounds pretty good in that preamp.
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Old 7th July 2004, 04:57 AM   #6
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Here you are (380S):
http://www.andiy.com/sch/38s.jpg
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Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it. - JC
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Old 7th July 2004, 04:50 PM   #7
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Thanks all for clearing my doubts. It looks to me that the 380S uses a combinations of different opamps from BB and AD. I'll go ahead to change the opamp in my 38S and see if it will provide a better performance by just using all 2604s.

Best regards,
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Old 19th March 2006, 02:18 AM   #8
mach.88 is offline mach.88  Germany
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How about if you switch the output transistors first. The N 380s uses MAT 02 and MAT 03 there and to my experience with my Levinson N380s they seem to do a very big deal in the upgrade...
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Old 19th March 2006, 10:38 AM   #9
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Quote:
Originally posted by Peter Daniel
Here you are (380S):
http://www.andiy.com/sch/38s.jpg

I think the URL is wrong or blocked. You get an HTTP 404 error.
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Old 19th March 2006, 11:17 AM   #10
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hi carlmart,

The link is an "old" link posted on 07-07-2004

regards
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