MUSICONICA
+  AudioNervosa
|-+  Systemic Development» Speakers» Line Arrays
Username:
Password:
Pages: 1 2 3 [4]   Go Down
  Print  
Author Topic: Line Arrays  (Read 2557 times)
0 Members and 2 Guests are viewing this topic.
djdube525
Obsessively Audiophilic
****
Offline Offline

Posts: 401



View Profile gallery
« Reply #45 on: May 17, 2017, 07:44:15 AM »

Does cable geometry (twisting conductors) affect inductive reactance?

What affect does inductive reactance have on signal passing through the cable?

FWIW... if ya want to geek out...

Here's a calculator for finding the inductance (L) of two parallel lines which can then be used to find the Reactance which is equal to 2*PI*f*L where f = frequency (more info here).



Logged
steve
Obsessively Audiophilic
****
Offline Offline

Posts: 358


View Profile WWW gallery
« Reply #46 on: May 17, 2017, 08:41:27 AM »

Thanks steve.
So in a feedback loop wewant short untwisted conductors.  Phase compensation with cap would not help because it rotates phase in same direction as the twisted conductor capacitance? Usually the ground leg is separated anyway.

It might sound good Rich, but no, you want only the capacitance that was originally designed in the feedback loop. Too much or too little will negatively affect phasing of the feedback signal.

But on speaker wires, I always keep the capacitance minimal.

525, yes, in general, paralleling inductors is similar to paralleling resistors.

Cheers
Steve
« Last Edit: May 17, 2017, 08:47:07 AM by steve » Logged

Pre/Amp/ICs are the only components that can be tested for accuracy/naturalness.

Steve Sammet
SAS Audio Labs
http://www.sasaudiolabs.com/pream11a.htm
sasaudio@omnilec.com
Ph: 309-263-0736
Retired.
richidoo
Administrator
Out Of My Speaker Cabinet
*****
Offline Offline

Posts: 10294



View Profile gallery
« Reply #47 on: May 17, 2017, 10:40:12 AM »

Thanks Dave

steve, when you parallel 8 conductors in SC, how do you separate them mechanically to avoid capacitance.
Logged
steve
Obsessively Audiophilic
****
Offline Offline

Posts: 358


View Profile WWW gallery
« Reply #48 on: May 17, 2017, 01:01:58 PM »

Thanks Dave

steve, when you parallel 8 conductors in SC, how do you separate them mechanically to avoid capacitance.

In my test setup, I just purchased either regular 18 gauge wire and cut to length. I have also purchased pairs of 18 gauge wire in common jacket and cut to length. Parallel the pairs together.
Do Not connect one wire to + and the other wire of the pair to -.

I just laid all the + 8 wires together and a foot or so apart from the - wires. Capacitance will be minimal, near zero. If all the + wires are close together, not a huge deal. Same for all the - wires. The main point is to separate the + from the - speaker wires.

Cheers
Steve
« Last Edit: May 17, 2017, 01:29:09 PM by steve » Logged

Pre/Amp/ICs are the only components that can be tested for accuracy/naturalness.

Steve Sammet
SAS Audio Labs
http://www.sasaudiolabs.com/pream11a.htm
sasaudio@omnilec.com
Ph: 309-263-0736
Retired.
richidoo
Administrator
Out Of My Speaker Cabinet
*****
Offline Offline

Posts: 10294



View Profile gallery
« Reply #49 on: May 17, 2017, 05:10:36 PM »

Right... no capacitance between the positives. Cool
Logged
Pages: 1 2 3 [4]   Go Up
  Print  
 
Jump to:  

Theme by webtechnica.com.
Page created in 0.038 seconds with 18 queries.