#1
Hi, Soon I will be getting a fender super champ XD, does the amp need to be bias? If so how much does it cost top get it done.

Thanks
#4
not trying to jack your thread but generally how do you know if you need to bias an amp or not

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Yeh the SICK! bit sounds a bit stupid.

#5
^ You have to find out if your amp is fixed or cathode bias.

There are two main types of biasing: fixed biasing and cathode biasing. Fixed biasing does not mean the bias is not adjustable, in fact, it usually means the opposite. Cathode biasing is usually fixed, and not adjustable, and fixed biasing is usually adjustable with a small trimmer potentiometer, or "trimpot".

This is from here:
http://www.aikenamps.com/WhatIsBiasing.htm
#7
you should bias it every time you change powertubes. You can usually get away without doing it if it's the same maker and tube, but they vary a lot even within the same batches. There are no guarantees you will be getting the best sound out of them, balanced with the best lifespan of the tube, without setting the bias correctly for that particular set of tubes.

Certain amp makers that sell fixed non adjustable bias amps will also test and sell tubes to fall within that fixed bias range. The other option is to buy from a dealer that knows and will test for that bias range. Makes it easier to change tubes, but not ideal since you can't set the bias specifically for that set of tubes.

edit: didn't read you were talking about the super champ, if it's cathode biased, no, you don't need to bias it when you change tubes.
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Last edited by Erock503 at Oct 27, 2008,
#8
Quote by Erock503
you should bias it every time you change powertubes. You can usually get away without doing it if it's the same maker and tube, but they vary a lot even within the same batches. There are no guarantees you will be getting the best sound out of them, balanced with the best lifespan of the tube, without setting the bias correctly for that particular set of tubes.

Certain amp makers that sell fixed non adjustable bias amps will also test and sell tubes to fall within that fixed bias range. The other option is to buy from a dealer that knows and will test for that bias range. Makes it easier to change tubes, but not ideal since you can't set the bias specifically for that set of tubes.

edit: didn't read you were talking about the super champ, if it's cathode biased, no, you don't need to bias it when you change tubes.


Bu the super champ uses 6V6 (or does it use 6L6 instead?), don't they need biasing?
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