Revelation: M4 chassis tubes

guitarslinger

guitarslinger

New member
I just had some Shuguang 9th gen and a JJ ECC83S in there.

WELLLLLL....

I stuck a NOS RCA 12AX7A in the lower V1 position, and a GE 12AT7 in the line driver V2(V10??) upper socket, and HOLY SHIT!!!!!!!!!!!!!!

I would say these matter every bit as much as the V1 or V2 in any of your modules. The thing just opened up with the clearest, most pleasantly grinding, distortion EVER. :rock: It's twice as easy to play now. I'm not sure which one made the bigger difference, but I'm guessing the V1. It just sounds SO killer now. I'm guessing the untested 9th gen was of lower quality, and killing my tone. It was adding some annoying grating quality to everything. It even might have been dying and going microphonic.

Don't neglect these two crucial tonal points in your signal chain.

It also cut the noise a little bit. :rock: :rock: :rock: :rock:
 
My M4 is labelled that way...12at7 and 12ax7...every time i've changed that at tube for an ax7..I've gone back.
 
Dude, I just had this revelation in my Mod50.

Stuck a NOS GE 12AX7 in the V1 spot in the chassis... TOTALLY opened up my tone.

That's an absolutely CRUCIAL tube right there.
 
The only real problem I've found after messing with v1 is that the character of that tube can totally dominate the tone..like a high gain, mid heavy tube can make everything downstream sound that way...

..a neutral tube is the compromise I guess.
 
Interesting, I just put a GE 5 star 5751 in V1 of my chassis and it allowed me to open up the master more with the same volume, but it seemed to open it up as well. Nice and clear. Also popped an Amperex AT7 in the V2 slot. It does sound really good this way. Fun stuff!!
 
For me, it wasn't really "taking a blanket off the amp" or "sock off the strings".

My Mod50 sounded pretty darn good to begin with! :lol: :LOL:

I don't know if this makes ANY sense, but to me, with a great preamp tube in V1 in the chassis, it's almost as if you hear the tube less, and the amp/modules more. it's just clearer sounding.

For me, an EH in V1 of the chassis just absolutely choked the tone. Tung Sol was getting better. But this GE tube is just awesome.
 
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