ADA Depot - A Forum To Support Users of ADA Amplification Gear

Let's Get Technical => All Things Tube => Tubes (preamp/Input/Buffer) => Topic started by: Systematic Chaos on June 27, 2018, 04:34:54 AM

Title: Groove Tubes GT12AX7M Mullard
Post by: Systematic Chaos on June 27, 2018, 04:34:54 AM
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
(http://i992.photobucket.com/albums/af41/MagnusBausW/CD898CD0-C6CF-43B2-83D3-0966C6CC937A_zpsswyrppd4.jpg)
Title: Re: Groove Tubes GT12AX7M Mullard
Post by: rnolan on June 28, 2018, 05:31:58 AM
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.
Title: Re: Groove Tubes GT12AX7M Mullard
Post by: MarshallJMP on June 28, 2018, 05:52:16 AM
They were supposed to be a reissue mullard back in 2000, they still sell them but now they are just rebranded Chinese tubes.
Title: Re: Groove Tubes GT12AX7M Mullard
Post by: Chip Roberts on September 12, 2018, 05:42:21 AM
I have GT12AX7s in both of my MP1s.  What makes this particular pair different?