A New Take on the Classic Pass Labs D1 with an ESS Dac - Page 67 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

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

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 18th November 2010, 12:14 PM   #661
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Quote:
Originally Posted by qusp View Post
if 1meg then you can probably get away with 0.1uf for a corner of 1.591549433hz and IMD up to 15.91549433hz this is for output cap, owen can probably help more with the input as I dont use it, neither does he AFAIK
My problem is that I doubt if the stepped attenuator type shunt don't affect the 1Meg input impedance of Borbely Line amp because each step of the attenuator is changing the impedance....
  Reply With Quote
Old 18th November 2010, 12:50 PM   #662
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
oh in that case, I would think it will, in fact it will probably dominate, so the output caps should be sized to account for bass all the way down at the minimum input impedance of the attenuator. this problem is not specific to this IV, the information you seek should be covered in the attenuator manual. find out what the minimum apparent input impedance is and calculate for that
  Reply With Quote
Old 18th November 2010, 12:52 PM   #663
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
The minimum input impedance of shunt attenuator is 10K, thanks for help.
  Reply With Quote
Old 18th November 2010, 02:26 PM   #664
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
no problem mate, in that case I would shoot for 8uf for a corner of 1.9hz and IMD up to 19hz. in practice you probably need less than this, but that should have you covered.
  Reply With Quote
Old 18th November 2010, 03:30 PM   #665
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Thanks qusp, for Legato Russ advice me 4.7uF-10uF & possible 2.2uF will do also.
  Reply With Quote
Old 18th November 2010, 03:55 PM   #666
opc is offline opc  Canada
diyAudio Member
 
opc's Avatar
 
Join Date: Oct 2004
Location: Ottawa, Ontario, Canada
Hi Guys,

Gogu:

Sorry about that, I have no idea why I thought your board was going to qusp. I'll correct the list, and your board will ship to your proper address this evening.

I have the following three boards being shipped to qusp tonight:

1. flocchini
2. jameshillj
3. qusp

Please correct me ASAP if this is wrong. I'll be shipping them tonight, and once they're gone, they're gone...

Horio:

Thanks for the payment! Your board will be going out tonight as well.

Nikon1975:

I sent you a PM with your total.

Did anyone else have any address changes? I really hope not, because everything shipped the the listed Paypal addresses. I have over 250 emails in my inbox relating to this group buy, so it's extremely difficult to keep track of shipping requests other than what is directly in the Paypal shipping instructions.

Please let me know about any issues as soon as possible.

Regards,
Owen
  Reply With Quote
Old 18th November 2010, 04:33 PM   #667
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
all good Owen, even if we are both mistaken, hes just up the road anyway so its no drama.

Merlin yep sounds like a plan, 2.2 would be really pushing it IMO, but perhaps 4.7 would do in a pinch and you wouldnt notice the IMD in the audio band. personally I would go for at least 6.8, with 8 being preferred, just to cover all bases
  Reply With Quote
Old 18th November 2010, 06:08 PM   #668
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Many thanks qusp, I will try with 8,2uF Axon at 2$48 USD each
  Reply With Quote
Old 18th November 2010, 06:41 PM   #669
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
@qusp
Legato is a good contender, standard kit with no mods & no new parts sounds very good with B II....far better than IVY
  Reply With Quote
Old 18th November 2010, 09:00 PM   #670
diyAudio Member
 
Join Date: Jan 2007
Merlin let us know how it sounds with various "boutique" caps you might try. I was thinking AmpOhm.
  Reply With Quote

Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pass Labs S/Ns ? dejanm Pass Labs 8 26th January 2007 07:35 AM
My opinion on Pass Labs and Mr. Pass (Nelson) himself b_online Pass Labs 11 21st May 2003 12:39 AM


New To Site? Need Help?

All times are GMT. The time now is 03:21 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2