Go Back   Home > Forums > > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Twisted Pear Superior quality electronic kits

Reply
 
Thread Tools Search this Thread
Old 5th February 2010, 06:58 PM   #781
DSP_Geek is offline DSP_Geek  Canada
diyAudio Member
 
Join Date: Aug 2003
Location: Santa Cruz, California
Just from curiosity, what's the output impedance of the B32-2? I'll be driving amplifiers (to wit UcD400s).
  Reply With Quote
Old 5th February 2010, 07:33 PM   #782
Russ White is offline Russ White  United States
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Quote:
Originally Posted by jcarr View Post
Dear Russ: I have a Buffalo 32S with Placid power supplies.

I believe that he said that 80MHz wasn't enough, and the next faster oscillator that he had was 100MHz, so that's what he put in, and it worked.

TIA, jonathan carr
Three things,

One - mathematically you would not need 100mhz (you would only need about 68mhz) to get 352.8khz (assuming you use I2S) 80mhz should be more than enough.

Two - 100mhz is at the very maximum for the master clock.

Three - I am not sure that the OSF on the ES9018 will correctly handle 352.8khz sampled data. You would probably have to run in OSF bypass mode. I am not sure on this though

Maybe Dustin could chime in.

In short I personally would not recommend a 100mhz clock.

Cheers!
Russ
__________________
Less pulp more juice Twisted Pear Audio.

Last edited by Russ White; 5th February 2010 at 07:44 PM.
  Reply With Quote
Old 5th February 2010, 07:35 PM   #783
Russ White is offline Russ White  United States
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Quote:
Originally Posted by DSP_Geek View Post
Just from curiosity, what's the output impedance of the B32-2? I'll be driving amplifiers (to wit UcD400s).
On its own, 195 ohms from each differential output.

Cheers!
Russ
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote
Old 5th February 2010, 07:52 PM   #784
Russ White is offline Russ White  United States
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Quote:
Originally Posted by jcarr View Post
The other day, a friend played for me some 352.8kHz 32-bit files master recordings, using one of ESS's evaluation DACs. According to my friend, ESS's evaluation DAC needed to be modified with a faster master clock in order to play the 352.8kHz files. I believe that he said that 80MHz wasn't enough, and the next faster oscillator that he had was 100MHz, so that's what he put in, and it worked.

TIA, jonathan carr
Actually the demo boards use a 40mhz clock. Not 80mhz.

So it is no surprise he had to use a faster clock, as you would need one > 68mhz or so.

Cheers!
Russ
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote
Old 5th February 2010, 08:17 PM   #785
SoapSeller is offline SoapSeller  Israel
diyAudio Member
 
Join Date: Jul 2007
Russ/Brian,
Are you going to allow pre-ordering of the Bipolar Placid and/or Placid+Buffalo-Kits?

(I believe that the new IVY will require bipolar supply... please correct me if I'm wrong)
  Reply With Quote
Old 5th February 2010, 09:30 PM   #786
BrianDonegan is offline BrianDonegan  United States
diyAudio Member
 
BrianDonegan's Avatar
 
Join Date: Dec 2004
Location: TPA HQ (The Basement)
The Placids will be in stock once the Buffalo boards arrive next week, but I will open them up for sale at the same time.

I will probably add some combo options for the buffalo as well, but not sure what at the moment. I will probably just do Buffalo, IVY III, Placid, Placid BP combo, though you could add a second Placid BP for dual-mono.

Also, if you want to do what I am calling mondo-dual-mono (two BII's in mono mode, each separate feeding an IVYIII) I will throw in the alternate IVYIII resistors*

I will do my best to have the pages updated tonight, but I just got back from picking up an outboard motor for my brother's catameran, and am heading out to dinner with the family, so it will be later tonight.

The sale will start at 8PM EST tomorrow, and have a second round 12 hours later. EST is GMT-5.




* You just know someone will want to try it! It will be a matter of dip switch settings.
  Reply With Quote
Old 5th February 2010, 09:35 PM   #787
Beefy is offline Beefy  Australia
diyAudio Member
 
Join Date: Apr 2008
Quote:
Originally Posted by BrianDonegan View Post
I will probably add some combo options for the buffalo as well, but not sure what at the moment. I will probably just do Buffalo, IVY III, Placid, Placid BP combo, though you could add a second Placid BP for dual-mono.

Also, if you want to do what I am calling mondo-dual-mono (two BII's in mono mode, each separate feeding an IVYIII) I will throw in the alternate IVYIII resistors*
Nice, but I have no idea how people could realistically fit it all in once case!
  Reply With Quote
Old 5th February 2010, 09:37 PM   #788
Russ White is offline Russ White  United States
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Actually should not be too hard to fit if you use one Placid BP and one Placid.

You just know some people will want that 3db extra DNR from the dual mono config.
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote
Old 5th February 2010, 09:38 PM   #789
dwk123 is offline dwk123
diyAudio Member
 
Join Date: Feb 2002
I haven't been following the Buffalo saga that closely since I'm still working on getting my Opus built out correctly, but my question is whether it is possible to run the Buffalo directly into a Ventus for a dedicated headphone setup, bypassing the Ivy?
  Reply With Quote
Old 5th February 2010, 09:40 PM   #790
Russ White is offline Russ White  United States
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Quote:
Originally Posted by dwk123 View Post
I haven't been following the Buffalo saga that closely since I'm still working on getting my Opus built out correctly, but my question is whether it is possible to run the Buffalo directly into a Ventus for a dedicated headphone setup, bypassing the Ivy?
It certainly is.
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote

Reply


Twisted Pear Audio - Buffalo32S (ES9018 DAC)Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


New To Site? Need Help?

All times are GMT. The time now is 06:14 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki