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Old 21st October 2011, 02:18 PM   #391
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Thank you for the answer Russ.

Desoldering them buffers should be fun
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Old 21st October 2011, 04:04 PM   #392
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Default Just got...

around to installing Supertex FETs in my L-II. My subjective impression indicates a slight improvement in dynamics and very low level detail...
At some point I will upgrade to a complete L-III.
BTW, I would expect more open sound in the high frequencies considering the revised analog filter cut off on the L-III, is anyone finding that?
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Old 21st October 2011, 04:13 PM   #393
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Quote:
Originally Posted by fred_com View Post
Thank you for the answer Russ.

Desoldering them buffers should be fun
Unless you have an SMT rework setup, I would not bother trying. In that case, it may make more sense to sell the Ventus and use the money to buy some new buffers.
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Old 21st October 2011, 07:26 PM   #394
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I would second what Brian said. No need to harm the Ventus, Just pick up a couple of buffers.
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Old 22nd October 2011, 09:02 PM   #395
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I have measured another IVY Buffalo II from a friend. And my BuffaloII with LegatoIII under identical conditions. My friend Ivy is also the original components of Twisted Pear Audio.

As the tone level is very close to +8 dBu maximum sensitivity meter I have done +14 dBu max. sensitivity meter to avoid saturation problems. Although measures have more background noise.

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Old 22nd October 2011, 10:57 PM   #396
NicMac is offline NicMac  Italy
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Which version of IVY are you testing? It says IVY 1 in the screen capture.
Anyway, your Legato III is doing pretty nice!!!
Cheers,
Nic

Last edited by NicMac; 22nd October 2011 at 11:00 PM.
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Old 22nd October 2011, 11:18 PM   #397
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Click the image to open in full size.
Both are that IVY III.

Last edited by oneoclock; 22nd October 2011 at 11:24 PM.
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Old 23rd October 2011, 04:08 AM   #398
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I am actually not entirely surprised by the result at 0dbfs. The reason being the high output of the IVY-III first stage. There are a couple of things you could do to make it a more fair comparison.

1) Reduce the 1st stage I/V resistors by half.

or....

2) Run the test at -6dbfs.

I am really so pleased that Legato performs this well. It s really even better than I expected.

Cheers!
Russ
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Last edited by Russ White; 23rd October 2011 at 04:14 AM.
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Old 23rd October 2011, 10:54 AM   #399
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IVY III:
R1, R2, R3, R4 (750/2)=360 Oh. approximately?
R13, R14, R15, R16 (180x2)= 360 Oh. approximately?
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Old 23rd October 2011, 03:30 PM   #400
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Quote:
Originally Posted by oneoclock View Post
IVY III:
R1, R2, R3, R4 (750/2)=360 Oh. approximately?
R13, R14, R15, R16 (180x2)= 360 Oh. approximately?
Yes. That combination should work well.
Remember that those resistors need be matched pairs.
Also it may be interesting to measure after the first stage as well as at the output.
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Last edited by Russ White; 23rd October 2011 at 03:33 PM.
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