Pro Audio Equipment In the Home - Page 5 - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 25th June 2006, 01:29 AM   #41
diyAudio Member
 
Join Date: Nov 2002
Very simple....

With XLR connectors short 3 to 1 in other words the inverted signal known as cold to the shield or ground. This will unbalance a balanced connection.

If dealing with a terminal strip make a short jumper to go from ground/shield to the minus or cold.

I suggest that attention be paid to proper grounding. As stated prior...there needs to be only ONE ground for the system otherwise the nasty gtound loop monster comes out to play.

There a a number of us with pro audio experience under our belts and I can say that we have all dealt with the noise issues have provided the solution based on experience and textbook knowledge.
  Reply With Quote
Old 25th June 2006, 02:57 AM   #42
diyAudio Member
 
Join Date: May 2006
Ok so I just did exactly what you guys told me and now the problem is even worse. I think I'm giving up, I'll just return the stuff and stick to home audio with all RCA's.
  Reply With Quote
Old 25th June 2006, 03:08 AM   #43
diyAudio Member
 
Join Date: Nov 2002
Send a picture or two of what you have done so we are clear on it
I'm sure we can resolve the problem.
  Reply With Quote
Old 25th June 2006, 05:19 AM   #44
jleaman is offline jleaman  Belgium
Banned
 
Join Date: Apr 2002
Send a message via AIM to jleaman
Hey never give up. We are all here to help. Im running the same type of cable with aleph mini's into a passive pot and well no hum. I tried it with the op-amp Bufer too. I agree with the picture. Can you post any pics ?
  Reply With Quote
Old 25th June 2006, 08:01 AM   #45
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Greets!

Maybe this will help: http://www.dplay.com/dv/balance/balance.html

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 25th June 2006, 01:27 PM   #46
diyAudio Member
 
BlackCatSound's Avatar
 
Join Date: Oct 2004
CARTRulz, disconnect the wire from pin 1 on the XLR end.
  Reply With Quote
Old 25th June 2006, 01:31 PM   #47
diyAudio Member
 
Join Date: Nov 2002
Picture of terminal strip unbalance
Attached Images
File Type: jpg p6240004.jpg (64.1 KB, 77 views)
  Reply With Quote
Old 25th June 2006, 01:32 PM   #48
diyAudio Member
 
Join Date: Nov 2002
Home made unbalance cables
Attached Images
File Type: jpg p6240003.jpg (61.2 KB, 75 views)
  Reply With Quote
Old 25th June 2006, 01:34 PM   #49
diyAudio Member
 
Join Date: Nov 2002
One could also use standard XLR cables and leave the 1-3 jumpers on the terminal strip for unbalanced.
  Reply With Quote
Old 25th June 2006, 01:38 PM   #50
diyAudio Member
 
Join Date: Nov 2002
Quote:
CARTRulz, disconnect the wire from pin 1 on the XLR end.
I believe that BlackCatSound is pointing out that it is sometimes necessary to float the shield on one end of the equipment to eliminate the hum.

This practice will and does vary from consultant to consultant. Some favor lifting the shield on the input and some on the output.
  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
Excess Audio Test Equipment 1audio Swap Meet 5 29th September 2011 10:13 AM
How to destroy your high-end audio equipment... HaflerFreak Solid State 109 27th May 2011 08:04 PM
Audio Equipment For Sale In Minnesota RMPEngineer Swap Meet 27 15th January 2010 03:28 AM
Unloading audio equipment Magnetmaz Swap Meet 5 18th October 2007 11:54 PM
fixing broken audio equipment cowanrg Everything Else 10 8th August 2002 12:38 AM


New To Site? Need Help?

All times are GMT. The time now is 12:27 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