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

Notification

Icon
Error

Login
BII dual mono - how to connect just to one balanced input each channel on an I/V stage
Options
View
Go to last post Go to first unread
Previous Topic Next Topic
andreaevan  
#1 Posted : 15 years ago
andreaevan

Rank: Member

Groups: Member
Joined: 8/9/2010(UTC)
Posts: 22
Location: Italy
Hello,
I read all the threads (I guess) but I didn't found a solution how to connect the BII - dual mode to a tipical I/V converter with only one balanced input each channel (one for the left and one for the right).
I saw all diagrams provided, but noone forsee this case, and is also specified that in dual mono each DAC has two balanced outputs and out of phase.

Of course I want to maintain 8 dac in parallel each channel and the dynamic range increased by this, but I want only one balanced output each DAC.

I think a picture is better than any word:
please see:

http://www.olaolaonline....64555_buffalo_zapfii.jpg

May you please tell me how to connect?

Thanks in advance!
Andrea
Back to top

Wanna join the discussion?! Login to your Twisted Pear Audio Support forum accountor Register a new forum account.
Back to top  
johnwmclean  
#2 Posted : 15 years ago
johnwmclean

Rank: Member

Groups: Member
Joined: 5/1/2009(UTC)
Posts: 8
Location: Australia
You need an I/V converter per channel.

Edited by user 15 years ago  | Reason: Not specified
Back to top
andreaevan  
#3 Posted : 15 years ago
andreaevan

Rank: Member

Groups: Member
Joined: 8/9/2010(UTC)
Posts: 22
Location: Italy
Dear John,
I don't think, logically, this is the best solution, also because in this case I would anyway have FOUR balanced outputs, and what should I do with these than?


Dear Russ, Brian,
may you please help me?


p.s.(I've though...but maybe I'm wrong: for each channel, to put in parallel the red and black of the two outputs, considering the outputs are of the opposite phase, is this a possible solution)?
Back to top
Dingo  
#4 Posted : 15 years ago
Dingo

Rank: Member

Groups: Member
Joined: 8/3/2010(UTC)
Posts: 25
Location: Australia
You can use dual mono BIIs with one stereo balanced I/V, or 2 mono balanced I/Vs.

The out of phase channel will become in phase if you cross the +/- wires over for that channel.
This will also double the peak current possible, so you'll need to make sure whatever I/V stage you will use can handle the faily massive ~32mA peak that the 8 DAC channels in parallel will be able to pump out.
Back to top
Brian Donegan  
#5 Posted : 15 years ago
Brian Donegan

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 2,868
Location: Massachusetts, USA

Thanks: 2 times
Was thanked: 141 time(s) in 134 post(s)
Dingo is correct about the wiring. He is also correct that your I/V stage will need to handle quite a bit of current, and the I/V resistance will need to be adjusted accordingly.
Back to top
WWW
andreaevan  
#6 Posted : 15 years ago
andreaevan

Rank: Member

Groups: Member
Joined: 8/9/2010(UTC)
Posts: 22
Location: Italy
Thank you very much!

May you please have the last check at this picture if everything is correct (even the dip-switch)?

http://www.olaolaonline....05737_buffalo_zapfii.jpg

In the mean time I'm asking LC Audio if the Zap filter supports 32 mA peak input each channel.

Thank you again,
Andrea
Back to top
facelvega  
#7 Posted : 15 years ago
facelvega

Rank: Member

Groups: Member
Joined: 10/1/2010(UTC)
Posts: 1
Location: paris, france
Hi all,

This is my first post on the TPA product support forum.

l have a question regarding the output current capability of the Buffalo II DAC board. The output needs an I/V conversion, what is the nominal current swing at the DAC output and what value of load impedance (resistor ?) would you suggest ? My intention is to use a transformer as an I/V converter.

Thanks and best regards,

Facelvega
Back to top
WWW
andreaevan  
#8 Posted : 15 years ago
andreaevan

Rank: Member

Groups: Member
Joined: 8/9/2010(UTC)
Posts: 22
Location: Italy
Hello Brian, Russ.

Considering my last connection diagram is correct (I had no confirmation on that) and I still want to implement a DUAL MONO DAC (already bought) with its advantages:

- which is the iRef resistor of the ESS9018 that I can change to adapt the peak current output to the Zapfilter?
- I mean, is that possible? Or which solution do you recomend?

Otherwise I see myself obliged to buy (two!) LEGATO or IVY III and the BALSIE for the unbalanced output...

Thanks in advance for your kind help!

Andrea
Back to top
Rss Feed  Atom Feed
Users browsing this topic
GuestUser
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