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

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

Build Thread - A New Take on the Classic Pass Labs D1 with an ESS Dac
Build Thread - A New Take on the Classic Pass Labs D1 with an ESS Dac
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 21st December 2010, 11:49 PM   #71
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
yeah but the point is, doing it the way he describes and then throwing away the voltage gain with adding another resistor, removes the only benefit he gets as the only dynamic range he gains this way is primarily by having a larger swing, plus add another resistor and you add noise. this way I think it is a waste of time and money personally
  Reply With Quote
Old 22nd December 2010, 12:02 AM   #72
PierreQuiRoule is offline PierreQuiRoule  Canada
diyAudio Member
 
PierreQuiRoule's Avatar
 
Join Date: Feb 2004
Location: Ottawa
Build Thread - A New Take on the Classic Pass Labs D1 with an ESS Dac
Do we know what the benefits might be? A few more dB of signal to noise ratio, less crosstalk (only one channel per DAC chip). It may very well sound better this way. I for one would be curious to know.
  Reply With Quote
Old 22nd December 2010, 04:17 AM   #73
opc is offline opc  Canada
diyAudio Member
 
opc's Avatar
 
Join Date: Oct 2004
Location: Ottawa, Ontario, Canada
Build Thread - A New Take on the Classic Pass Labs D1 with an ESS Dac
Hi Guys,

Keep in mind what allows this circuit to work better than the original D1. Having far more current output from the DAC allows for much lower resistor values while still maintaining a decent 2VRMS output. If you wanted to use the Buffalo in mono mode, then it would be best to halve the resistance values again to say 200 ohms and 100 ohms, and drop the rails. This would prevent having to throw away voltage gain, and it allows you to take advantage of the higher current output of the DAC.

That is indeed something I'd be interested to see.

Cheers,
Owen
  Reply With Quote
Old 22nd December 2010, 04:48 AM   #74
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
but how will it be quantified, arent we already at the limits of distortion values that actually make any difference audibly? seem to me this is numbers for numbers sake. i'd also be interested to see the numbers, I just want to make sure he realizes this could very well be a very big expensive fools errand and there are probably better areas to be spending the money.

the only people that I know personally that have gone dual mono with the BII have not been able to tell the difference, even russ and co admit its at the edge of being measurable. of course the lower R value might indeed mean it sounds better, and if i'm honest, I bought a second teflon ackodac to go dual mono eventually, but I will do it with a proper summing stage

if he drops the rails, does he not also drop the Tc of the fets?

Last edited by qusp; 22nd December 2010 at 04:56 AM.
  Reply With Quote
Old 24th December 2010, 01:33 PM   #75
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
Xmas came early for me , look what I found under the tree plus another one the same (and 2 for a friend) partially stuffed Ackodac Rogers teflon substrate AKD12P ES9012 dac. I love it when a good plan comes together, this has been in the works for a while now, if it sounds half as good as it looks (and going by my experience with the regular version it will) then i'm gonna be a very happy man, this combined with the D1 IV with Zfoils and CuTF VCAPs, mini gold regs...oh my
Attached Images
File Type: jpg PTFE AKD12P Teh Sexy.jpg (219.5 KB, 888 views)
File Type: jpg PTFE AKD12P clear small.jpg (228.6 KB, 871 views)
File Type: jpg PTFE AKD12P Teh SEX small.jpg (238.2 KB, 853 views)

Last edited by qusp; 24th December 2010 at 01:36 PM.
  Reply With Quote
Old 24th December 2010, 01:47 PM   #76
flocchini is offline flocchini  United States
diyAudio Member
 
Join Date: Feb 2004
Location: Davis,CA
Beautiful board !!!!

Happy Holidays to all !!!

Best

Bob
  Reply With Quote
Old 24th December 2010, 01:52 PM   #77
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
indeed it is, in fact its past midnight here, so Happy holidays indeed!!
  Reply With Quote
Old 25th December 2010, 07:40 AM   #78
richluvsound is offline richluvsound  United Kingdom
diyAudio Member
 
richluvsound's Avatar
 
Join Date: Sep 2010
Location: LONDON
Default Merry Christmas !

Hi Guys,

how does this TPA thing work ... Do I just fill in the order form and Pay ..then wait ... ?

Rich
  Reply With Quote
Old 25th December 2010, 11:13 AM   #79
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
hmm, you do realize this isnt the buffalo II thread right? yeah thats about the size of it though, if they are available on the site at the moment, which I doubt they are, then you just load one into the cart and buy it, then they'll ship it when ready. AFAIK they arent in stock at the moment, they sell out pretty quickly, generally you have to buy one within 5 minutes of them being on sale. if the buy buttons arent there on the product page, there will be some info on there telling you when the next round of preorders is.

but please do not reply in here, this is the build thread for the D1 IV stage group buy
  Reply With Quote
Old 25th December 2010, 11:35 AM   #80
richluvsound is offline richluvsound  United Kingdom
diyAudio Member
 
richluvsound's Avatar
 
Join Date: Sep 2010
Location: LONDON
Default I know Sir ?

Dear Downunder ,



I was part of that group buy , only I bought the kit from Owen before I bought the Buffalo II

Besides that , thanks for the info ... I have been trying to get one since the summer ....

Best of the season to you , Rich
  Reply With Quote

Reply


Build Thread - A New Take on the Classic Pass Labs D1 with an ESS DacHide 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
A New Take on the Classic Pass Labs D1 with an ESS Dac opc Digital Line Level 1763 3rd April 2015 01:33 AM
Pass D1V3 DAC - build thread spzzzzkt Pass Labs 224 8th December 2012 03:40 AM
FS: Elektor Audioo DAC-2000 w/Pass labs D1 clone I/V sachi Swap Meet 4 26th November 2010 04:57 PM
IRF610 I/V convertion from Pass Labs D1 dac - single ended schiller Digital Line Level 5 15th October 2009 04:33 PM


New To Site? Need Help?

All times are GMT. The time now is 01:53 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki