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What is the standard size dc input jack socket for music equipment i.e. mini amps and guitar effects gadgets? Answered

As quite a few people will have noticed (because i have asked so many 'beginners' questions on here) I am building a mini guitar amp.

I am wanting to use a 2.5mm or a 2.1mm dc input socket, I was just wondering if there was a 'standard' size connector. I'm sure I have heard there is one size commonly used in guitar effects pedals and equipment like that.

It doesn't really matter, because this is likely to be a one- off product, but if something breaks a few years down the line then I would like to be able to say i'd used the most common jack, so i can get a replacement.

4 Replies

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orksecurityBest Answer (author)2011-01-27

Usual solution is pick something and count on folks using adapters... or just using a separate wall-wart for each device, which is more common.

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bobbyderf123 (author)2011-12-22

In radioshacks catalog 2.5mm is size "m".

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mdog93 (author)2011-01-27

yeah cool, I think 2.5mm dc jack is very common anyway.

@Lemonie, that's a good idea although not quite necessary i don't think, i just wondered if were one of the two which is more commonly used than the other.

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lemonie (author)2011-01-27


It depends upon what you want to plug into it. You might want the best world-wide compatibility, but ultimately you'll only be connecting a few devices to it.
How about 3 different sockets in parallel?

L

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