Cabinet Merger wire gauge important or not?

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Cabinet Merger wire gauge important or not?

Postby pervyinthepark » 28 Sep 2019, 01:46

Hey I'm making someone a cabinet merger and was working with some really heavy gauge wire, but its kind of a pain in such a tiny box with small jacks. Would it be OK for me to just use small gauge wire for such a short distance or would that limit the wattage he could use?
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Re: Cabinet Merger wire gauge important or not?

Postby thetragichero » 28 Sep 2019, 02:00

so what gets me is that guitarists stress about like 12ga vs 10ga speaker wire from head to cab when the majority of cabinets I've seen are wired with 18ga or smaller wire
you should be fine

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Re: Cabinet Merger wire gauge important or not?

Postby pervyinthepark » 28 Sep 2019, 02:07

Thanks lol. From what I read, at low distances it really matters less and less but there were no specifics I could find except on longer distances. I'm going to be using 22gauge. Thanks! I'm sure it'll work now.
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Re: Cabinet Merger wire gauge important or not?

Postby plush » 28 Sep 2019, 09:39

pervyinthepark wrote:at low distances it really matters less and less but there were no specifics


You can calculate your cable DCR knowing your wire gauge and copper resistance per meter/feet. It mostly the DCR that defines how much current it can pass without overheating. Also there is such thing as skin effect, that must be taken into account when dealing with higher frequencies (basically, at higher freqs only the outer part of the cable conducts currents, this lowers overall effective thickness of the cable). So, fatter cable is always better (also stranded>solid). But, as already been told, it's not much applicable to guitar and consumer audio.
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Re: Cabinet Merger wire gauge important or not?

Postby george giblet » 29 Sep 2019, 05:00

so what gets me is that guitarists stress about like 12ga vs 10ga speaker wire from head to cab when the majority of cabinets I've seen are wired with 18ga or smaller wire
you should be fine


To put that in the context of DC resistance the length of wire in the cabinet is short so it doesn't add much DC resistance. The DC resistance of the external cable adds to the resistance of the wire inside the cabinet.
However, just because the cabinet uses 18 gauge doesn't mean you should continue the same gauge outside of the box for a long run. A long run of thin cable could add DC significant resistance.

For the most part DC resistance won't affect the tone of a tube amp much because a tube amp has a high output impedance. You might lose a bit of power. For a solid-state bass head you might want to keep things as low as possible.
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Re: Cabinet Merger wire gauge important or not?

Postby rockola » 29 Sep 2019, 07:08

plush wrote:there is such thing as skin effect, that must be taken into account when dealing with higher frequencies


There are no high frequencies in audio, at least when it comes to skin effect. If you're dealing with mega- or gigahertz, sure, you should take it into account. Not so much in the kHz range.
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Re: Cabinet Merger wire gauge important or not?

Postby phatt » 29 Sep 2019, 14:08

I use figure 8 mains cable, some call it twin flex,,the stuff you see on a table lamp.
Don't over think it. :wink:
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