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Author Topic: Groove Tubes GT12AX7M Mullard  (Read 3737 times)

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Systematic Chaos

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Groove Tubes GT12AX7M Mullard
« on: Time Format »

Anyone remember these?
They were hyped some 10-12 years ago and IIRC Harley was a massive user and was raving about them.
I always thought they were discontinued....
I went to a music store today and they had a massive stock so I bought 2 (18$ a piece, fairly reasonable) for my also newly acquired Mesa V-Twin.
First impression is really good....detailed and musically rich
Mesa Boogie MkIIC+ DRGX, Mesa Boogie MkIVa Short Head, Mesa Boogie MkIVb Short Head, Mesa Boogie Single Rectifier Solo 50 Head, ADA MP-1 v1, ADA MP-1 v2, Fractal AxeFX II, Rocktron Velocity 150; Digitech GSP1101, DigiTech 2120Artist, Carvin Tube 100, Yamaha MFC10//
Ibanez RG550RF, Ibanez 540S-LPF DY, Ibanez RGR620TKS, Ibanez RGR620TPS, Ibanez RG550Ltd BK, Ibanez RG7620MSOL, Ibanez RGR465MCA, Ibanez RGR765RCB, Ibanez RG620QMSP, Ibanez RG1420FBHB, Ibanez RGT42MDX, 90s ESP M-II Dlx, PRS SC245 //
DiMarzio CrunchLab/ToneZone/Gravity Storm/Liquifire/AirNorton/PAF Pro/HfH/ibzUSA F Series pups


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Re: Groove Tubes GT12AX7M Mullard
« Reply #1 on: Time Format »

He SC, no I don't recall them, but Harley (where is he these days  :dunno: ) know his stuff  :thumb-up: So what are they really ?  GT don't make tubes (as you know) just test and rebrand.Shame you don't have an ADA preamp with you to test them in  :facepalm: .  My guess is these (from what you say) would be nice in a MP1.
Studio Rig: MP2/MB1 > Eurorack UB2442FX-Pro > TC M-One XL > Behringer Truths (with Truth Sub) / QUAD ESL 63s
Live Rig: MP2/MB1 > Alesis Quadverb > Alesis Midiverb 4 > Yamaha AM802 > B200s/Carvin TS100/DCM200L > ADA Split Stacks/Mesa P112s


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Re: Groove Tubes GT12AX7M Mullard
« Reply #2 on: Time Format »

They were supposed to be a reissue mullard back in 2000, they still sell them but now they are just rebranded Chinese tubes.

Chip Roberts

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Re: Groove Tubes GT12AX7M Mullard
« Reply #3 on: Time Format »

I have GT12AX7s in both of my MP1s.  What makes this particular pair different?
Rack of Death:
MP1 v2.01/Roland GP8/Boss NS50/ADA B200s

Boss TU2, Mooer Pitchbox, Boss BF2, Boss CE5, MXR EVH Phase 90, Behringer HB01 Wah/ART X15 Ultrafoot/

Custom 2X12 with WGS Retro 30/HM75
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