Mark Levinson 380S

Sunsun22 · 6th July 2004, 04:39 PM

Does anyone know what is the opamp being used in this preamp? Thanks

Nelson Pass · 6th July 2004, 07:48 PM

I have been told it was a Burr Brown 604.

Upupa Epops · 6th July 2004, 08:06 PM

604 ? I can't belive, that this " superfirm " should to use this not so much good circuit

.

Nelson Pass · 6th July 2004, 10:19 PM

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?

Peter Daniel · 7th July 2004, 12:04 AM

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.

Peter Daniel · 7th July 2004, 03:57 AM

Here you are (380S):
http://www.andiy.com/sch/38s.jpg

Sunsun22 · 7th July 2004, 03:50 PM

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,

mach.88 · 19th March 2006, 01:18 AM

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 N°380s they seem to do a very big deal in the upgrade...

carlmart · 19th March 2006, 09:38 AM

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.

Greg Erskine · 19th March 2006, 10:17 AM

hi carlmart,

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

regards

6th July 2004, 04:39 PM	#1
Sunsun22 diyAudio Member Join Date: Jul 2004 Location: Hong Kong	Mark Levinson 380S Does anyone know what is the opamp being used in this preamp? Thanks

7th July 2004, 03:57 AM	#6
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	Here you are (380S): http://www.andiy.com/sch/38s.jpg __________________ www.audiosector.com “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

19th March 2006, 10:17 AM	#10
Greg Erskine diyAudio Member Join Date: Jan 2002 Location: Sydney/Australia	hi carlmart, The link is an "old" link posted on 07-07-2004 regards __________________ Greg Erskine

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6th July 2004, 07:48 PM	#2
Nelson Pass The one and only Join Date: Mar 2001	I have been told it was a Burr Brown 604.

6th July 2004, 08:06 PM	#3
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	604 ? I can't belive, that this " superfirm " should to use this not so much good circuit .

6th July 2004, 10:19 PM	#4
Nelson Pass The one and only Join Date: Mar 2001	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?

7th July 2004, 03:50 PM	#7
Sunsun22 diyAudio Member Join Date: Jul 2004 Location: Hong Kong	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,

19th March 2006, 01:18 AM	#8
mach.88 diyAudio Member Join Date: Dec 2005 Location: Mannheim Germany	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 N°380s they seem to do a very big deal in the upgrade...

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