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Groove Tubes Gold Series GT-12AT7 Preamp Tube   

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The Groove Tubes GT-12AT7 preamp tube is manufactured to the highest quality JAN spec. NOS, made in Russia for extremely long life. Used widely in mo...Read More

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      OVERVIEW

      The Groove Tubes GT-12AT7 preamp tube is manufactured to the highest quality JAN spec. NOS, made in Russia for extremely long life. Used widely in most U.S.-made amps and, in particular, Fender amps. Fender amps with reverb use 2 - 12AT7s -- one for the reverb drive stage, and one as a phase inverter to drive the push/pull output stage. The makeup of the 12AT7 is very similar to the 12AX7 and it can be substituted for a 12AX7 in a pinch. Some players prefer the 12AT7 in the driver stage of a Marshall for a cleaner, brighter tone. (The driver or phase inverter is the 12AX7 located nearest the power tubes.) The 12AT7 is rarely used in a tone-generating stage, but rather in function stages, so the Groove Tubes GT-12AT7 is selected for durability.

      Country of origin: Russia

      Tested under extreme listening conditions and guaranteed to be free of excess noise and microphonic ring.

      FEATURES
      • Tested under extreme conditions
      • Guaranteed free of excess noise and squeal
      • JAN spec.
      • Military
      • NOS
      • Extremely long life

      SPECIFICATIONS

      Gold Series GT-12AT7 Preamp Tube

      • Country of origin: Russia
      Reviews
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      Review Snapshot

      by PowerReviews
      Groove TubesGold Series GT-12AT7 Preamp Tube
       
      4.3

      (based on 11 reviews)

      Ratings Distribution

      • 5 Stars

         

        (9)

      • 4 Stars

         

        (0)

      • 3 Stars

         

        (0)

      • 2 Stars

         

        (0)

      • 1 Stars

         

        (2)

      60%

      of respondents would recommend this to a friend.

      Pros

      • Improves sound (3)

      Cons

      No Cons

      Best Uses

      No Best Uses
        • Reviewer Profile:
        • Experienced (4)

      Most Liked Positive Review

       

      Good tube for the Phase-inverter.

      My amp sounds better than ever, I put Ruby 6L6's in the power section, Tung-sol 12AX7's for the drive tubes and the Groove tube 12AT7 for my power inverter. It brought...Read complete review

      My amp sounds better than ever, I put Ruby 6L6's in the power section, Tung-sol 12AX7's for the drive tubes and the Groove tube 12AT7 for my power inverter. It brought my amp back to life! (mostly switching the ECC38 to 12AX7 tubes) But they all add up to tone!
      Groove tubes 12AT7 pre-amp tube, It's sturdy. I chose it because it is supposed to be a very solid, durable tube for the phase-inverter. Time will tell.
      No complaints. Gimme a year, and I'll ley you know how it holds up.
      MF always seems to shine through, when it comes to bang for the buck.

      VS

      Most Liked Negative Review

       

      Was Great for One Hour, then TOAST!

      Used to replace a 12AX7 pre amp on Vox AC4TV for more headroom. Worked great. After an hour of playing, it started to rattle fiercely. Tapping on tube in live circuit with the...Read complete review

      Used to replace a 12AX7 pre amp on Vox AC4TV for more headroom. Worked great. After an hour of playing, it started to rattle fiercely. Tapping on tube in live circuit with the eraser of a pencil produced extreme microphonics, worse ever heard. Put Electro Harmonics 12AX7 back in, problem solved. Anyone know a good quality 12AT7?

      Reviewed by 11 customers

      Displaying reviews 1-10

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      1.0

      Don't bother buying one. Noisiest tube I have ever used.

      By hammermaN

      from Northern Wi

      About Me Professional Musician

      Pros

        Cons

        • Not Functional

        Best Uses

          Comments about Groove Tubes Gold Series GT-12AT7 Preamp Tube:

          Snap Crackle Pop best describes this tube.

          Comment on this reviewHelp Icon

           
          5.0

          GT-12AT7 Review

          By KAL

          from Chippewa Falls, WI USA

          About Me Experienced

          Ask me a question

          Pros

          • Easy To Use
          • Functional
          • Good Quality
          • Improves Sound

          Cons

            Best Uses

              Comments about Groove Tubes Gold Series GT-12AT7 Preamp Tube:

              This tube works very well for the inverter section. Well matched/balanced and higher gain (similar to a 12AX7).

              Just put one in a Fender Hot Rod DeVille in the V3 location (i.e. inverter before the power tubes).

              Nice warm tone, punchy.

              Comment on this reviewHelp Icon

               
              5.0

              Fits Great in my Randall Head

              Profile Image

              By Espyago

              from Brownsville, Tx

              About Me Experienced

              Verified Buyer

              Pros

              • Improves Sound

              Cons

                Best Uses

                • Backup
                • Concerts
                • Practicing

                Comments about Groove Tubes Gold Series GT-12AT7 Preamp Tube:

                I puted this on my Randall RH300+ and it works great, no problems at all, highly recomended

                Comment on this reviewHelp Icon

                (1 of 1 customers found this review helpful)

                 
                5.0

                GT-12AT7 Gold Series

                By Kencomp

                from Pennsylvania

                About Me Experienced

                Ask me a question

                Verified Buyer

                Pros

                • Easy To Use
                • Functional
                • Good Quality
                • Great Sound
                • Improves Sound

                Cons

                  Best Uses

                  • Concerts
                  • Practicing

                  Comments about Groove Tubes Gold Series GT-12AT7 Preamp Tube:

                  I am completely satisfied with these replacement tubes for my Hot Rod Deluxe. The factory 12AX7 tubes were great, just too loud. The sound quality is just as good if not the same.

                  Comment on this reviewHelp Icon

                  (1 of 1 customers found this review helpful)

                   
                  1.0

                  Was Great for One Hour, then TOAST!

                  By MrGoodthing

                  from Seattle

                  About Me Experienced

                  Verified Buyer

                  Pros

                    Cons

                    • Extremely Microphonic
                    • Poor Quality

                    Best Uses

                    • Demonstrate Microphonics

                    Comments about Groove Tubes Gold Series GT-12AT7 Preamp Tube:

                    Used to replace a 12AX7 pre amp on Vox AC4TV for more headroom. Worked great. After an hour of playing, it started to rattle fiercely. Tapping on tube in live circuit with the eraser of a pencil produced extreme microphonics, worse ever heard. Put Electro Harmonics 12AX7 back in, problem solved. Anyone know a good quality 12AT7?

                    Comment on this reviewHelp Icon

                    (2 of 2 customers found this review helpful)

                     
                    5.0

                    Good tube for the Phase-inverter.

                    By Doug Pearl

                    from Ohio

                    Comments about Groove Tubes Gold Series GT-12AT7 Preamp Tube:

                    My amp sounds better than ever, I put Ruby 6L6's in the power section, Tung-sol 12AX7's for the drive tubes and the Groove tube 12AT7 for my power inverter. It brought my amp back to life! (mostly switching the ECC38 to 12AX7 tubes) But they all add up to tone!
                    Groove tubes 12AT7 pre-amp tube, It's sturdy. I chose it because it is supposed to be a very solid, durable tube for the phase-inverter. Time will tell.
                    No complaints. Gimme a year, and I'll ley you know how it holds up.
                    MF always seems to shine through, when it comes to bang for the buck.

                    Comment on this reviewHelp Icon

                    (1 of 1 customers found this review helpful)

                     
                    5.0

                    Product Well Worth It!!!

                    By Thomas & Janet

                    from Undisclosed

                    Comments about Groove Tubes Gold Series GT-12AT7 Preamp Tube:

                    I rate this Tube all the way because it delivers excellent tone. I have installed it in my MXL 960 Condensor, and Art-2 PreAmp, but decided to leave it in the 960 because my Mic is set up for a 12AT7 Tube. It never hurts to experiment!
                    This a quiet operating Tube, giving a smooth tone.

                    Comment on this reviewHelp Icon

                    (2 of 2 customers found this review helpful)

                     
                    5.0

                    Great tube for noisy amps

                    Comments about Groove Tubes Gold Series GT-12AT7 Preamp Tube:

                    I put this in the phase inverter section like the description mentioned. WOW, what a difference. I have a Peavey JSX that was very noisy. I couldn't believe the difference. There was practically no noise coming from the amp. I had to double check the standby switch to make sure it was on. It didn't really drop the gain of the amp too much. It did make it sound a whole lot better. I have a tigther bass tone, everything over all sounds better. This is the tube that I will always use in front of the power tubes for now on.

                    Comment on this reviewHelp Icon

                    (2 of 3 customers found this review helpful)

                     
                    5.0

                    welcomed distortion & warmth

                    By Son of Gib

                    from Boonville, IN

                    Comments about Groove Tubes Gold Series GT-12AT7 Preamp Tube:

                    I bought several tubes to test and notice different sounds. Nothing negative is written here. This is only a comparison review from my personal experience. Hope it helpsAnalog Tube Sounds ? (On Nady RSM-2 Ribbon Mic)Listed in order from articulate to warmth, from high-end presence to sub-sonic presence, from detailed to softened.Tung-Sol ? 12AX7 Pronounced and Articulate, Impressive Presence, Slightly Warm Highs with Crystal Lows, DetailedRuby Tubes ? 12-AX7ACZ-HG / E86-33 S Highly Versatile, Good Detail on the Highs, Moderately Roughened Edges, Average Thickness, Slightly Mudded Mid'sBugera ? 12AX7D Average-Warmth, Defined Mid-Range Muddiness, Compressor- Like ProjectionGroove Tubes Gold Series ? 12AT7 Very Warm, Slight & Welcomed Distortion at Peaks, Thick & Partially Muddy, Harder EdgesElectro-Harmonics ? 12AX7 EH Very Warm, Very Soft, Very Thick, Seems to Normalize Signal Spikes, Lower than Average Projection

                    Comment on this reviewHelp Icon

                     
                    5.0

                    Great Sounding Tube

                    By Rocker-R3L7B

                    from Missouri

                    Comments about Groove Tubes Gold Series GT-12AT7 Preamp Tube:

                    I put one of these in a tube Equalizer that I have to replace the import tube it came with and it made a very noticable difference. Much stronger lows and mids. Nice round sound.

                    Comment on this reviewHelp Icon

                    Displaying reviews 1-10

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