Legato 3 - Look ma! No caps! - Page 40

fred_com · 21st October 2011, 01:18 PM

Thank you for the answer Russ.

Desoldering them buffers should be fun

barrows · 21st October 2011, 03:04 PM

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?

BrianDonegan · 21st October 2011, 03:13 PM

Quote:

Originally Posted by fred_com

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.

Russ White · 21st October 2011, 06:26 PM

I would second what Brian said. No need to harm the Ventus,

Just pick up a couple of buffers.

oneoclock · 22nd October 2011, 08:02 PM

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.

NicMac · 10:00 PM

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

oneoclock · 10:24 PM

Both are that IVY III.

Russ White · 03:14 AM

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

oneoclock · 23rd October 2011, 09:54 AM

IVY III:
R1, R2, R3, R4 (750/2)=360 Oh. approximately?
R13, R14, R15, R16 (180x2)= 360 Oh. approximately?

Russ White · 02:33 PM

Quote:

Originally Posted by oneoclock

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.

21st October 2011, 03:04 PM	#392
barrows diyAudio Member Join Date: Jul 2010	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?

21st October 2011, 06:26 PM	#394
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	I would second what Brian said. No need to harm the Ventus, Just pick up a couple of buffers. __________________ Less pulp more juice Twisted Pear Audio.

22nd October 2011, 09:57 PM	#396
NicMac diyAudio Member Join Date: Feb 2009	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 10:00 PM.

22nd October 2011, 10:18 PM	#397
oneoclock diyAudio Member Join Date: Oct 2010	Both are that IVY III. Last edited by oneoclock; 22nd October 2011 at 10:24 PM.

23rd October 2011, 03:08 AM	#398
Russ White diyAudio Member Join Date: Jan 2005 Location: Nashville, TN, USA	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 __________________ Less pulp more juice Twisted Pear Audio. Last edited by Russ White; 23rd October 2011 at 03:14 AM.

21st October 2011, 01:18 PM	#391
fred_com diyAudio Member Join Date: Nov 2009 Location: Kharkov	Thank you for the answer Russ. Desoldering them buffers should be fun

22nd October 2011, 08:02 PM	#395
oneoclock diyAudio Member Join Date: Oct 2010	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.

23rd October 2011, 09:54 AM	#399
oneoclock diyAudio Member Join Date: Oct 2010	IVY III: R1, R2, R3, R4 (750/2)=360 Oh. approximately? R13, R14, R15, R16 (180x2)= 360 Oh. approximately?

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