When running ~ 2K watts + to a subwoofer - what gauge speaker wire should be used? - Page 3 - AVS Forum
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post #61 of 68 Old 02-02-2012, 10:34 PM
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Call the manufacture and find out.
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post #62 of 68 Old 02-04-2012, 12:02 AM - Thread Starter
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For what it's worth on page 10 of the XLS-5000 manual it says use 16awg wire for lengths up to 25 foot.

2.5 Choose Output Wire and Connectors
Crown recommends using pre-built or professionally
wired, high-quality, two-conductor, heavy gauge
speaker wire and connectors. You may use 2-pole or 4-
pole SpeakonĀ® connectors (Figure 2.5 ), banana plugs,
or bare wire for your output connectors (Figure 2.6). To
prevent the possibility of short-circuits, wrap or otherwise
insulate exposed loudspeaker cable connectors.

Using the guidelines below, select the appropriate size
of wire based on the distance from amplifier to speaker.
CAUTION: Never use shielded cable for output
wiring.
Distance Wire Size
up to 25 ft. 16 AWG
25-40 ft. 14 AWG
41-60 ft. 12 AWG
61-100 ft. 10 AWG
101-150 ft. 8 AWG
151-250 ft. 6 AWG

The speakon connectors inside the amp are connected with red and black 14AWG wire.

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post #63 of 68 Old 02-04-2012, 08:20 AM
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Here is a nice guide to actually determine what your amp is putting out at your desired listening levels: http://trussinme.com/apps/audio/voltagecalc/default.asp

In the perfect scenario you provided you might find out that you are not really pushing the amp constantly to 2500W, or 70+ Volts for each channel. Basically, find some test tones, hook up your meter in ac volt function, and measure the amp output at your listening level. Keep in mind by using a test tone does not simulate real use. I would just stick with the 12awg...
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post #64 of 68 Old 02-04-2012, 02:57 PM
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if you have a good meter, why not directly measure amps? That, and length are what matter for sizing anyway. I think my fluke will handle at least 10 amps.
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post #65 of 68 Old 07-02-2014, 10:28 PM
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Great older thread!

I plan on doubling up once my second roll of identical 12 gauge shows up. Unfortunately I found out my cable ended up being Copper-clad aluminium 12 gauge wire. My research shows that CCA has more resistance making it equivalent of 14 gauge copper. Luckily I got a killer deal on it otherwise I'd be bummed.

I wonder would it be better to use a separate 12 gauge run for each sub box or running a single run (but doubled up in parallel) then hooping the second nearby sub? The amp ends up seeing 2-ohm per channel either way. The longest run would be 55ft. I'm guessing the 55ft run would benefit from doubling up due to length seeing how I'm using CCA.

What if the first sub has a much shorter run than the second sub when sharing the same terminal jack? Can anyone think of any technical benefits/disadvantages?

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post #66 of 68 Old 07-02-2014, 10:32 PM
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post #67 of 68 Old 07-02-2014, 11:27 PM
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Quote:
Originally Posted by notnyt View Post
just replace it with 10gauge.
Any noticeable significant improvements?
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post #68 of 68 Old 07-02-2014, 11:29 PM
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Quote:
Originally Posted by WereWolf84 View Post
Any noticeable significant improvements?
long run needs heavier gauge. Easiest in the end with one run of what you need than some not so good 12 gauge and whatever else added to it.
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