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Old 13th February 2014, 08:37 AM   #1
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Default crossover hook-up cable lengths

Hi all.

A basic question for most I know but here goes...

I'm building some crossovers and because of the way that the components arranged the positive input and the negative input cables could be different lengths approximately 3" on the positive and 6" on the negative.

Does having different lengths make any difference? Or should I make them equal?

Thanks

Last edited by ringo_the_hifi; 13th February 2014 at 04:55 PM.
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Old 13th February 2014, 12:52 PM   #2
fpitas is offline fpitas  United States
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No discernible difference.
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Old 14th February 2014, 11:29 PM   #3
xjr100 is offline xjr100  Europe
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Quote:
Originally Posted by ringo_the_hifi View Post
Does having different lengths make any difference?
At that length no difference.
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Old 15th February 2014, 02:06 AM   #4
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it is all about resistance. Zero resistance, no introduction of losses. That is it.
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Old 15th February 2014, 02:12 AM   #5
dlp4341 is offline dlp4341  United States
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See

http://www.amanogawa.com/archive/docs/C-tutorial.pdf

Don
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Old 15th February 2014, 03:03 AM   #6
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Originally Posted by dlp4341 View Post
it is way to much for music applications. It is important for stuff that works at high frequency like radars and so on. Not much use for speakers, and here is why. Any crossover calculations assume that we have Zout ( Amplifier) = 0 and any speaker is active load. That is it. Who is trying to calculate by including all real and unreal factors basically forgets that best speakers have total distortion level of around 4%.
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Old 15th February 2014, 09:41 AM   #7
AllenB is offline AllenB  Australia
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Devils,
I don't know? Source impedance is often negligible (and is often ignored regardless).. but sometimes it isn't. For every 'j' there is an 'i'

Ringo,
Electricity travels at around the speed of light, which explains away the distance. There will be a small change in the resistance and reactance found around the cable but it isn't a significant concern with audio. All that normally matters with speaker cabling is clean connections.
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Old 15th February 2014, 09:48 AM   #8
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Thanks francis, allen and all... I didn't think it would make any notable differences but great to get feedback.
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