Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

Login
Output impedance of Legato 3
Options
View
Go to last post Go to first unread
Previous Topic Next Topic
glt  
#1 Posted : Monday, October 10, 2011 11:56:54 AM(UTC)
glt

Rank: Member

Groups: Member
Joined: 11/9/2007(UTC)
Posts: 453
Location: usa
Is it 1KOHM?
Can it be lowered?
Back to top
BLOG

Wanna join the discussion?! Login to your Twisted Pear Audio Support forum accountor Register a new forum account.
Back to top  
Russ White  
#2 Posted : Monday, October 10, 2011 8:53:08 PM(UTC)
Russ White

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN

Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
No. :) Its about 150R at the balanced output. Actually slightly less. At the SE outputs its practically zero to 100khz.

Edited by user Monday, October 10, 2011 8:54:02 PM(UTC)  | Reason: Not specified
Back to top
WWW
glt  
#3 Posted : Monday, October 10, 2011 11:38:33 PM(UTC)
glt

Rank: Member

Groups: Member
Joined: 11/9/2007(UTC)
Posts: 453
Location: usa
Hi Russ,

Thanks. Wanted to use it with http://www.diyaudio.com/...fets-21.html#post2738299
and take advantage of the cm rejection of the balanced input. Otherwise, the IVY III would be perfect -but I already have the Legato
Back to top
BLOG
Russ White  
#4 Posted : Tuesday, October 11, 2011 5:23:59 AM(UTC)
Russ White

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN

Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
You could probably use that amp without any issues, just adjust the feedback resistors upward a bit, I see that it has AC coupled inputs. Hopefully that is optional.

If you are after CM rejection you might try Sympatico. It has the benefit of being fully symmetrical at the inputs and the outputs and is completely DC coupled and has much higher input impedance. It also has the PS built in and local shunt regulation.

Edited by user Tuesday, October 11, 2011 8:14:23 AM(UTC)  | Reason: Not specified
Back to top
WWW
Russ White  
#5 Posted : Tuesday, October 11, 2011 6:21:40 AM(UTC)
Russ White

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN

Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
Honestly that amp is probably just not a great fit for Legato because of its low impedance asymmetric nature.
Back to top
WWW
glt  
#6 Posted : Tuesday, October 11, 2011 9:19:47 AM(UTC)
glt

Rank: Member

Groups: Member
Joined: 11/9/2007(UTC)
Posts: 453
Location: usa
I thought the same too. IVYIII is a better fit...
Back to top
BLOG
Russ White  
#7 Posted : Tuesday, October 11, 2011 7:27:44 PM(UTC)
Russ White

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN

Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
That amp is not going to have "good" common mode rejection with any balanced source because of the asymmetrical nature if it's input impedance. If that is what you are after you should look elsewhere. Acceptable sure. Awesome, no.

Edited by user Tuesday, October 11, 2011 7:51:33 PM(UTC)  | Reason: Not specified
Back to top
WWW
Rss Feed  Atom Feed
Users browsing this topic
GuestUser (4)
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Youtube
Copyright © Twisted Pear Audio