7581A -vs- 6L6WGB

Sean French

Silver Supporting Member
Messages
14,570
I just retubed my TR K&M Custom with my last pair of Phillips 7581A'.
Still have some JAN Phillips 6L6WGB' that I bought as spares for my first TR amp which was the Amethyst Special Indoor Storm combo.
What is the difference between the two tubes spec and sound wise?
Thanks.
 

veldt666

Member
Messages
313
Iv'e used, (& still do) both types in my Fuchs & Fender Twin for many years.
7581 has a bigger voice, top & bottom, & HIGH headroom. It is a 35w tube.
6L6WGB, has lower headroom, & more of a midrange voice.
Both have Exeptional tone, NEVER matched by any other tube.
 
C

clamdip7714

Different beasts. The 7581A's are counterparts to GCs and the WGBs are to 5881. If you want a great tube either the Phillip or GEs are nice 7581a.
 

sickboy79

Member
Messages
14,127
The WGBs are roughly 23-25 watts - similar to a true 5881. Really amazing tubes. I've got them in a couple amps. I really dig them - nice warm tone with a very prounounced midrange which I like - and lower headroom than 6L6GCs, and much lower than 7581s. I've never personally owned 7581s, but have heard them in amps. Nice sounding tubes - just a bit to much headroom for my tastes.
 
Messages
3,765
I like to call the 7581a the "SRV tube". It has a lot more headroom, but it sounds BIGGER then 6l6 tubes i've used. Some declare them as brighter, but I think they tend to have a wider frequency spectrum then other 6l6 types.

I simply don't use anything other then 7581a power tubes anymore. They just sound "right" to me.
 

GrecoVee

Member
Messages
880
I have a pair of Phillip's 7581A's in an old Ampeg V2 and they just Kill!
Great tube!
A great cheap alternitive to them I've found is the TAD 6L6 (Large Bottle) tubes. These sound great in old Ampegs and Boogies.
 




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