#1
I gonna put some new power tubes in my jcm900 dual reverb 2 x 12 combo. My amp tech only has these tubes. Does anybody know anything about these tubes... mostly how long they last and sound quality?
#2
i bet they sound amazing i don't know about long lasting
but i read somewhere groove tubes are supposed to last longer than regular tubes
i want those for my plexi but... i jsut put new tubes in it
i wish i new how to bias an amp
#3
^Why would they last longer, they're just relabeled tubes. GT doesn't make their own tubes. So that makes them the "regular" tubes.

Mullards are great IMO, really musical, at least, that's what I know about the preamp tubes.
Peavey 5150
Mesa Mark IV
Mesa Single Rectifier (Series 1)
Fender Custom Shop Tonemaster
Roland Microcube

-Whitebox OS 1x12
-Port City OS 1x12

Digidesign Eleven RackAxe Fx Ultra
#5
my groove tubes went microphonic a week after i got them. Same thing happened to my friend. I hate groove tubes with a passion.
My Gear:
Fender American Deluxe Stratocaster
Epiphone Sheraton II
Fender Blues Deluxe Reissue
Teese RMC Picture Wah
MXR Carbon Copy
Keeley Modded TS9
Korg Pitchblack
Schecter Omen 6
Dean Performer Acoustic

#6
For your Marshall, try getting some SED =C= tubes.
Gear:
Gibson SG '61 RI
Fender MIJ 62RI Tele
PRS Singlecut SE
Epiphone Sheraton II
Ibanez AEG10NT
Orange Rocker 30
Blackstar HT5C
#8
Quote by Reincaster
^Why would they last longer, they're just relabeled tubes. GT doesn't make their own tubes. So that makes them the "regular" tubes.

Mullards are great IMO, really musical, at least, that's what I know about the preamp tubes.


groove tubes make their own power amp tubes