UCD180 balanced via soundcard - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 16th December 2007, 06:36 PM   #1
diyAudio Member
 
Join Date: Sep 2004
Location: Everywhere
Question UCD180 balanced via soundcard

Hi,

I plan to build UCD180 monoblocks that would be driven balanced via an RME or ESI Julia soundcard. Anyone tried this before?

I want to avoid a preamp and control volume only via software.

Regards,

Mike
  Reply With Quote
Old 16th December 2007, 06:57 PM   #2
BWRX is offline BWRX  United States
diyAudio Moderator Emeritus
 
Join Date: Jan 2005
Location: Pennsylvania
Surely someone has, but even if they don't chime in you should be fine.
__________________
Brian
  Reply With Quote
Old 17th December 2007, 02:13 PM   #3
lucpes is offline lucpes  Europe
diyAudio Member
 
Join Date: Dec 2003
Location: Iasi
Send a message via Yahoo to lucpes
Used an EMU 1212m for this purpose, works like a charm...
__________________
Deep down inside.
  Reply With Quote
Old 17th December 2007, 02:17 PM   #4
diyAudio Member
 
Join Date: Sep 2004
Location: Everywhere
How was the sound via the 1212M?
  Reply With Quote
Old 17th December 2007, 02:43 PM   #5
diyAudio Member
 
PigletsDad's Avatar
 
Join Date: Jul 2007
Location: South Worcestershire
The downside of this approach is that you reduce DAC resolution at anything other than full volume. To take any extreme example, say you want or need to listen at -90dB. This corresponds to losing 15bits of resolution. On a 16bit sound card, you are down to 1 bit conversion, and even a 24bit one only has 9bits active. Of course, this should be very quite, so may be it is not a problem.

At the very least, I would want to set the gains pretty carefully, so that full gain corresponds to the loudest you want to listen, and so the amount of resolution loss at normal levels is minimised.
  Reply With Quote
Old 18th December 2007, 10:37 PM   #6
diyAudio Member
 
MikeHunt79's Avatar
 
Join Date: Aug 2003
Location: Bristol, UK
Quote:
Originally posted by PigletsDad
The downside of this approach is that you reduce DAC resolution at anything other than full volume. To take any extreme example, say you want or need to listen at -90dB. This corresponds to losing 15bits of resolution. On a 16bit sound card, you are down to 1 bit conversion, and even a 24bit one only has 9bits active. Of course, this should be very quite, so may be it is not a problem.

At the very least, I would want to set the gains pretty carefully, so that full gain corresponds to the loudest you want to listen, and so the amount of resolution loss at normal levels is minimised.
Simply buy a nice quad gang pot for volume control - problem solved.
  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
Which soundcard with balanced outs has the best SQ and is less than $250? MikeHunt79 Digital Source 7 28th October 2007 05:19 PM
Modify soundcard, unbalanced to balanced. Llafriel Parts 6 16th May 2006 03:12 PM
Balanced Zen v5 + balanced Zen line stage Adrie Pass Labs 0 30th May 2004 05:27 PM
Balanced line stage connected to pc with soundcard lykkedk Pass Labs 9 23rd March 2003 06:51 PM
Zen Balanced Line Stage Balanced vs Unbalanced macka Pass Labs 28 11th December 2002 06:18 AM


New To Site? Need Help?

All times are GMT. The time now is 11:26 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