XLR attenuation on SRC2496 - 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 4th June 2012, 09:32 AM   #1
diyAudio Member
 
Join Date: Jun 2012
Default XLR attenuation on SRC2496

Hi

I have an SRC2496. I am currently experimenting with it between my CDP and DAC for upsampling only. I'd like to just take the output from the SRC2496. I have tried its XLR output using XLR to phono converter plugs and the old Technics 900MK2 can handle the 3.5v output, but it makes the amp hot.

I have seen on ebay XLR attenuation plugs in three sizes, 10db, 15db, and 20db.

It is my understanding that I want to take the 3.5v line level output of the SRC2496 andf make it a more normal 2v line level.

I don't think any of these attenuation plugs do this? Or would they? What would give me my desired outcome?
  Reply With Quote
Old 4th June 2012, 11:26 AM   #2
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
I presume you are actually talking about the DCX2496 yeah? the SRC2496 is an i2s input sample rate convertor chip by Texas Instruments and does not have an analogue output, it outputs i2s digital and only when its actually in a design, does nothing by itself. the DCX has this chip in it, but it has nothing to do with the DAC/analogue output stage
  Reply With Quote
Old 4th June 2012, 05:03 PM   #3
diyAudio Member
 
Join Date: Jun 2012
Hi, my question is much more basic than that (I know this forum tends to be for more experienced users). Plus I got some info wrong and probably didn't explain myself properly.

I am experimenting with the Behringer SRC2496 Ultramatch Pro.

I am currently outputting from my CDP via SPDIF to the Ultramatch Pro then to a SMSL 2496 1794 DAC. I know, sounds hideous. I'd like to use the L-R analog outs of the Behringer, but they are high? at +16dbu? Certainly it sounds high, with very little movemnt of the amplifier volume knob resulting in max volume.

Should I, can I attenuate the output? If I did this with attenuator XLR sockets, what dbu attenuation whould I be aiming for?
  Reply With Quote
Old 4th June 2012, 05:38 PM   #4
Davey is offline Davey  United States
diyAudio Member
 
Join Date: Dec 2001
Location: Bremerton, WA.
XLR/RCA adaptor plugs have an internal short between pin 1 and pin 2 or 3 (I can't remember which) which the Behringer senses and adjusts gain to be 6db higher. You need to perform surgery on your XLR/RCA adaptor plugs to remove that short. That will yield 6db of "attenuation" and might solve your issue. If not, you'll need to add further attenuation outboard.

Cheers,

Dave.
  Reply With Quote
Old 6th June 2012, 04:43 PM   #5
diyAudio Member
 
noSmoking's Avatar
 
Join Date: May 2010
Location: Texas
Default rane has a big tutorial .....

also you can get some transformers ,I used some for line matching from edcor.com ,You can also make a t pad with resistors and add a volume control to drop the gain down to a better level you will need 2 to stay balanced ,or go to esp sound products and get a attenuator board and build it ! Rane shows how to go single ended if you need to and use one pot for volume control.....ESP also has board for single in to balanced and balanced back to single ,so there's a bunch of ways to go

Keep at it you will get it !!!!!!!!
  Reply With Quote
Old 6th June 2012, 05:45 PM   #6
diyAudio Member
 
Join Date: Jun 2012
much to think about, thank you!
  Reply With Quote
Old 6th June 2012, 06:11 PM   #7
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Quote:
Originally Posted by jackyno7 View Post
I have seen on ebay XLR attenuation plugs in three sizes, 10db, 15db, and 20db.

It is my understanding that I want to take the 3.5v line level output of the SRC2496 andf make it a more normal 2v line level.

I don't think any of these attenuation plugs do this? Or would they? What would give me my desired outcome?
A 10dB attenuator attenuates about 1:3 so your 3.5V gets down to about 1.15. That is all you need; you still will have to turn down the level to avoid blowing your speakers, even if the theoretical max level is 1.15V instead of 2V.

But did you try un-attenuated? The difference between 3.5 and 2 is not that much and is easily compensated with the volume control, provided the 3.5 doesn't overdrive anything. You actually may not even have a problem at all.

jan didden
__________________
If you don't change your beliefs, your life will be like this forever. Is that good news? - W. S. Maugham
Check out Linear Audio!
  Reply With Quote
Old 6th June 2012, 06:54 PM   #8
diyAudio Member
 
Join Date: Jun 2012
So sorry for not explaining the specification properly.. the linel level out isn't 3.5v.. it's probably more like 6 or 7.. 14dbu...
  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
Xlr Stereo To Xlr Mono jaya000 Solid State 4 9th February 2009 03:24 AM
src2496 new and old techzombie Digital Source 3 23rd June 2008 04:24 AM
XLR to RCA with attenuation pad. KOL69 Everything Else 1 25th April 2008 12:10 AM
SRC2496 re-clock? Tenson Digital Source 0 22nd May 2007 09:58 PM
Behringer SRC2496 Spearmint Digital Line Level 10 19th September 2004 03:03 AM


New To Site? Need Help?

All times are GMT. The time now is 12:31 AM.


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