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  1. #1
    Top Of The World patvh1's Avatar
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    05.23.12 @ 02:26 PM
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    Default Difference in power amp tubes

    Hi all! I just bought a Peavey JSX(joe satriani) halfstack afew months ago. The tube amp thing is new to me, and I was wondering if someone could give me some inlightment into the differences of the different size power amp tubes. The tubes that are in there now are EL 34's. I'm told that I can switch these out to 6L6GC's. I did look on the back of the head, and sure enough there's a switch back there for the two different tubes. My question is: What's the difference? Is one tube that different from another in sound? Also, what is bias? The manual say's that if I change out the EL 34's to the 6L6GC's, I have to adjust the bias. Any help would be great. I dod have a little electronics backgound, so feel free to be technical if you want!
    "I endorsed the guitar I used to play, I designed this one.....Big Difference!" EVH

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    Romeo Delight sgill72's Avatar
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    09.07.17 @ 07:17 AM
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    Default well...

    From what little I know...the best way for me to explain the "sound" differences between the two would be that EL34's seem to break up a little earlier than 6L6's do. That is why most good Marshalls always had EL34's. The don't have nearly the gain that a JSX, 5150, Triple X, etc. would have. 6L6's will give you more headroom, and are a cleaner power tube than an EL34. I hope this helps you out a bit.
    sgill72

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  3. #3
    Top Of The World patvh1's Avatar
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    Default

    OK, makes sense!
    "I endorsed the guitar I used to play, I designed this one.....Big Difference!" EVH

 

 

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