# Difference between A and B pots

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whats the difference between the A and the B on Pots? Does it affect the sound of the guitar? Just wondering cos i got a stack of pots and they are A and B.

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A = logarithmic taper, B = linear taper. If you have both, id suggest using the A pots for volume, and B pots for tone.

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I have a few of American pots that are linear with an "A" marking.

It's also my understanding that the "B" is the audio taper (logarithmic).

Correct me if I'm wrong please...

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Perry's right, at least for the Alpha pots I've been using; according to the catalog, A=log/audio, B=linear and C=antilog/reverse audio.

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Perry is not right and neither am I.

Take a look at this (PDF file)

Apparently there's a difference between US-, far East- and European-made pot codes.

I also found out that the A and B code has been swapped a while ago.

Funny how people can make something easy so confusing...

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whats the difference between the A and the B on Pots? Does it affect the sound of the guitar? Just wondering cos i got a stack of pots and they are A and B.

I forgot to try to answer your question... No, it won't change the sound of your guitar (that is if you use the same value's... 250K for single coil pups and 500K for humbuckers).

The A and B difference is the taper.

Let's say you have a 500K pot. if you turn it one way to the end the resitance is appr. 500K, turn it the other way (also to the stop on the pot), it's 0K.

A linear pot would measure 250K if you have the shaft of the pot in the middle, the taper is linear.

On a log. pot the value would be very different (400K or 80K..just an example to explain) if you turn it exactly halfway.

The pic explains: The line marked with R0 would be a linear pot, the line with R1K would be a log. pot.

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Perry is not right and neither am I.

Looks like you're both right, considering your respective locations. Thanks for that clarification - I occasionally run across European equipment, and that's good to know.

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