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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...Click To Read More About This Product

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OVERVIEW

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

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

FEATURES
  • Tested under extreme conditions
  • Guaranteed free of excess noise and squeal
  • JAN spec.
  • Military
  • NOS
  • Extremely long life
  • Country of origin: Russia
SPECIFICATIONS
  • Country of origin: Russia
Reviews
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Review Snapshot

by PowerReviews
Groove TubesGold Series GT-12AT7 Preamp Tube
 
4.1

(based on 13 reviews)

Ratings Distribution

  • 5 Stars

     

    (10)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (3)

50%

of respondents would recommend this to a friend.

Pros

  • Improves sound (4)
  • Easy to use (3)
  • Functional (3)
  • Good quality (3)

Cons

No Cons

Best Uses

  • Concerts (3)
  • Practicing (3)
    • Reviewer Profile:
    • Experienced (4), Professional musician (3)

Most Liked Positive Review

 

welcomed distortion & warmth

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...Read complete review

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

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 13 customers

Displaying reviews 1-13

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(3 of 4 customers found this review helpful)

 
5.0

welcomed distortion & warmth

By Son of Gib

from Boonville, IN

See all my reviews

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

(2 of 2 customers found this review helpful)

 
5.0

Good tube for the Phase-inverter.

By Doug Pearl

from Ohio

See all my reviews

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.

(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.

(1 of 1 customers found this review helpful)

 
5.0

GT-12AT7 Gold Series

By Kencomp

from Pennsylvania

About Me Experienced

See all my reviews

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.

    (1 of 1 customers found this review helpful)

     
    1.0

    Was Great for One Hour, then TOAST!

    By MrGoodthing

    from Seattle

    About Me Experienced

    See all my reviews

    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?

      (1 of 1 customers found this review helpful)

       
      5.0

      Product Well Worth It!!!

      By Thomas & Janet

      from Undisclosed

      See all my reviews

      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.

       
      5.0

      It worked

      By Animal

      from Athens, TX

      About Me Professional Musician

      See all my reviews

      Verified Buyer

      Pros

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

      Cons

        Best Uses

        • Backup
        • Concerts
        • Practicing

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

        Swapped out V1 on Hot Rod Deluxe with this preamp tube to get more control over volume. It worked great.

         
        1.0

        Poor quality

        By Mik3 Honcho

        from Indiana

        About Me Professional Musician

        Verified Buyer

        Pros

          Cons

          • Not Functional
          • Poor Quality

          Best Uses

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

            Got the first tube. Installed it. Turned on the amp to hear a loud hi pitch squeal. Returned it. Got the second one. Installed it. Turned on the amp. Strummed the first chord. Heard a rattle. Every time I touched the tube I could hear it through my amp. The tube was microphonic. I give up. Done with GT.

             
            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.

                 
                5.0

                GT-12AT7 Review

                By KAL

                from Chippewa Falls, WI USA

                About Me Experienced

                See all my reviews

                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.

                     
                    5.0

                    Fits Great in my Randall Head

                    By Espyago

                    from Brownsville, Tx

                    About Me Experienced

                    See all my reviews

                    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

                       
                      5.0

                      Great Sounding Tube

                      By Rocker-R3L7B

                      from Missouri

                      See all my reviews

                      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.

                       
                      5.0

                      Sounds Good

                      By Anonymous

                      from Undisclosed

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

                      Works for me... Warm sound... does what a tube should do.

                      Displaying reviews 1-13

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