Different Speaker Cable Lengths for Mains/Center?? - AVS Forum
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post #1 of 17 Old 10-16-2006, 09:26 AM - Thread Starter
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Hello Guys!

I have a few questions and would like some insight on this.

Would there be a varience in sound if the speaker wires are of different lengths for your mains and center channel seakers?

I just got off the phone with a forum sponser about speaker lengths, and he suggested that I kept all front speakers(mains,center) the same speeaker length. He said the varience in resistence in the lengths can vary the sound for each speaker. Which I agree to a point... but I don't think a few feet are going to make a huge or noticiable difference? I definetly don't have the golden ears for that!

What do you guys think about this, and do you guys use the same cable length for your mains and center?

Thank you for your time!

Mike
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post #2 of 17 Old 10-16-2006, 10:51 AM
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It certainly can, but remember, if you are talking a few feet, it shouldn't make any audible difference. If the mains are say 8' and the center is 50', then that may be an issue. It is generally a good idea to keep them the same length but I wouldn't lose any sleep over it.

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post #3 of 17 Old 10-16-2006, 12:41 PM - Thread Starter
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Thanks Kevin!

I'll be using a 3 meter run for my center, 3 meters for my right main, and 5 meters for my left. The way he expalined it, it wasn't a good idea. I don't think I'll hear a sonic difference at all? I'd rather go shorter on my right main then have a coil of wire hanging around.

Mike
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post #4 of 17 Old 10-16-2006, 12:49 PM
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Cvetan1

I am planning a similar set-up with about 7 feet for my left main 7 feet center and about 11 feet for my right main....I just cant see having 4 feet of speaker cable coiled up just so the front soundstage has equal speaker lenghths...

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post #5 of 17 Old 10-16-2006, 12:52 PM
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Hey Mike....i would always recommend using the same length for the right and left speakers....so if you need 5 meters for your left i would use 5 meters for your right....same lengths for both front speakers always !, IMO...hope this helps

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post #6 of 17 Old 10-16-2006, 12:56 PM
 
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i would always recommend using the same length for the right and left speakers
why?
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post #7 of 17 Old 10-16-2006, 12:59 PM
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Quote:
Originally Posted by Cvetan1
Thanks Kevin!

I'll be using a 3 meter run for my center, 3 meters for my right main, and 5 meters for my left. The way he expalined it, it wasn't a good idea. I don't think I'll hear a sonic difference at all? I'd rather go shorter on my right main then have a coil of wire hanging around.

Mike
Well for imaging for your mains, I would try to have the lenghts the same.....the center channel I think won't make a huge issue but for the balance to the 2 fronts, I would certainly have the lenghts the exact same.

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post #8 of 17 Old 10-16-2006, 01:02 PM
 
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If you're losing enough power to make a noticable difference in level, with a few extra feet of cable...then you need to change the cable to a gauge that can handle it.
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post #9 of 17 Old 10-16-2006, 01:17 PM - Thread Starter
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That's what I figure to Targus, I can't argue with you.

I'm going to be bi-wiring my fronts with 12gauge. Which really is overkill! But I like it that way!

The vendor was stating a difference in resistance/ohms between the different lengths might make a difference in my soundstage? I don't think in the distance of the run i'm using and the 12 gauge bi-wired is even going to have any resistance at all?

Mike

Edit: nicco- I notice you are from Peoria, if you are in the are you are more than welcome to stop by. Drop me a PM sometime. That is after Feb. I'm currently in Iraq for the moment.
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post #10 of 17 Old 10-16-2006, 01:18 PM
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I agree with Targus.

I used to be anal about that sort of thing, until I had to use a bit longer runs in-wall. Since then it's been all about keeping them all as short as possible.

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post #11 of 17 Old 10-16-2006, 01:38 PM
 
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I don't think in the distance of the run i'm using and the 12 gauge bi-wired is even going to have any resistance at all?
It will have resistance, unless it's cooled to 0K.

It is said that a change in sound level of 3dB is the smallest perceptable change that can be detected by a human. In order for a speaker cable to have this effect, it's resistance must equal the impedance of the speaker.
If your speaker cable is long enough (or thin enough) to drop half the power fed to the speaker...then you need to increase the gauge.
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post #12 of 17 Old 10-16-2006, 01:59 PM - Thread Starter
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I was being sarcastic. 0ff course there will be some, just very minimal in the length of runs and gauge wire I'll be using.

Thank you guys for all the feedback, I feel better now! : )

Mike
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post #13 of 17 Old 10-16-2006, 05:57 PM
 
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I don't have one wire in my whole set up thats the same & I've never noticed any difference in a thing. I used to have everything down to the inch of each other but got tired of looking/ dealing with the excess.
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post #14 of 17 Old 10-20-2006, 02:39 PM
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Quote:
Originally Posted by Cvetan1

I'll be using a 3 meter run for my center, 3 meters for my right main, and 5 meters for my left. The way he expalined it, it wasn't a good idea.

Mike
And you are planning to use 12 gauge wire. According to a handbook that I happen to have, the typical resistance of 12 gauge copper wire is 0.00521 ohm/meter, so you are talking about a difference between left main and the others of (rounding a bit) 0.010 ohm. Looks negligible to me, there is probably more variation in the output impedance of different channels of your receiver or amplifier due to imperfect matching of the components.

Even wimpy 16 gauge wire would provide 0.0132 ohm/meter, or difference of 0.026 ohm in your case.
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post #15 of 17 Old 10-20-2006, 03:45 PM - Thread Starter
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Yes, I plan on using 12awg bi-wire. So, it actually comes out to like 9awg or something.
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post #16 of 17 Old 10-21-2006, 03:21 PM
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Man, I leave this area for a few months and it sure changed a lot!
Where did all of the skeptics go?
A couple feet extra here or there is not going to have an effect, especially on such short cables. If you had long cables with a lot of inductance you might lose some of the highs (maybe) - depending on the speakers and amps, but resistance is for the most part just raising the electric bill.
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post #17 of 17 Old 10-21-2006, 04:48 PM
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Quote:
Originally Posted by tsteves
Man, I leave this area for a few months and it sure changed a lot!
Where did all of the skeptics go?
I count it as 7 to 1 in favour of the skeptics, or maybe 6 to 2 if they count Kevin on the other side (which I wouln't really).

Didn't only nicco say they should be the same?

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