Patchbay question - diyAudio
Go Back   Home > Forums > Design & Build > Construction Tips
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Construction Tips Construction techniques and tips

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
Thread Tools Search this Thread
Old 18th January 2011, 09:53 AM   #1
docz is offline docz  Norway
diyAudio Member
Join Date: Nov 2004
Location: Tønsberg
Default Patchbay question

Hello folks. I have a question. I'm building a patchbay to use in my studio, it is for easy access to my Liquid Saffire 56, so I am going to build two patch panels using XLR plugs, and I am going to build a stagebox with patch panel to go over my drumkit. Since multicore wire is very expensive, I need some tips on what I can get away with.

First, can I hook all the ground terminals together, and use one common ground wire? Or do all plugs need their own ground wire?

Second, what thickness wire do I need? I can get my hands on some 12 pair 0.19mm2 cable at a nice price. If I need to go to 0.22mm2 it costs 10x per meter.


  Reply With Quote
Old 18th January 2011, 11:11 AM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
Join Date: Jul 2004
Location: Scottish Borders
are you working with balanced lines at normal signal levels?

Screened twisted 2core or screened twisted star quad work well at signal levels, if your transmit and receive impedances are correct.

You do not need a lot of copper at the low current levels in line level signal.

What is the resistance of the 0.19sqmm pair for a 100m length?
What is the voltage drop along that 100m length if the peak current is 1mApk?
regards Andrew T.
Sent from my desktop computer using a keyboard
  Reply With Quote
Old 18th January 2011, 11:20 PM   #3
diyAudio Member
Speedskater's Avatar
Join Date: Sep 2002
Location: Lakewood, Ohio
The XLR's pin #1 is for the screen (shield), they are connected to the chassis not the audio or circuit ground.

I think that the 0.22mm2 is about 76 Ohm per KM
and the 0.19mm2 is about 84 Ohm per KM.

So from an audio signal point of view, no difference.

Is each pair screened in each case?
  Reply With Quote


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
Quickie woodworking question! With bonus shellac question... head_unit Construction Tips 13 12th September 2010 05:38 PM
do i REALLY need a crossover?? and an amp question. and an ohm question legendaryfrog Multi-Way 4 29th October 2006 01:39 AM
newbie with input tran. question and wiring question imo Solid State 0 18th January 2006 10:10 PM
patchbay maintenance__ arjun Instruments and Amps 8 12th April 2005 10:15 PM

New To Site? Need Help?

All times are GMT. The time now is 06:22 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2