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Item # 100200658 | Customer Ratings: Ratings ( 5 Based on 2 reviews)

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Groove Tubes Gold Series GT-12AU7 Preamp Tube
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      Groove Tubes Gold Series GT-12AU7 Preamp Tube (100200658)
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Hand-selected for musical quality.

The Groove Tubes GT-12AU7 preamp tube is based on a design from the Ei factory in the former Yugoslavia. The GT-12AU7 is an excellent quality large-plate European-made driver tube, styled after the famous Telefunken line of dual triodes. The usual application for a 12AU7 tube is as the phase inverter that drives the power tubes. These are very well matched, and so are highly recommended for Ampeg SVT's and other amps using this tube as a phase inverter. Also commonly used as phase inverters in McIntosh Hi-Fi amps, some Ampeg amps, and will yield the most clean headroom in many amps.

In the latest Fender Pro Series amps such as the Pro Reverb, Concert, and Twin, this tube in V2 (or a 12AY7), will drop the gain of the gain channel where some feel the tone is of a less intense or "buzzy" character. This will then allow a much wider range in the sweep of the volume and gain controls of this channel.

Country of origin: China

Groove Tubes Gold Series GT-12AU7 Preamp Tube Features:

  • Country of origin: China


Groove Tubes Gold Series GT-12AU7 Preamp Tube Specifications:

  • Country of origin: China


Groove Tubes Gold Series GT-12AU7 Preamp Tube

90 day warranty on power tubes, includes replacement of whole set if one tube goes bad.
180 day warranty for preamp tubes.
3 year warranty on SubstiTubes and Solid State Rectifier.
Check with M-Audio for warranty on GT microphones.

Get your gear covered!

Now you can get added warranty protection for your new gear. Pro Coverage steps in where the manufacturer's "normal wear and tear" ends. Our PRO COVERAGE program offers you UPGRADED COVERAGE if your product ever fails!

Pro Coverage includes:

  • Accidental damage protection (new gear only)
  • Expedited Repair
  • Free Shipping (for returns or repairs)
  • 100% Coverage for Commercial Use
  • Extended Return Period
  • Extended Price Protection
  • No Lemon Guarantee
  • Free Transfer of Coverage to a new owner
  • Repair Costs Covered for up to 3 years from date of purchase
  • Repairs Can Be Authorized Toll-Free by Phone or the via the web
Product Reviews
(Based on 2 reviews)
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  • works well

    As reviewed by kathryn lacy on 9/15/2012

    put this in v4 on my 333 bugera. Totally reduced the gain and crappy fizz. love it

    1 of 1 people found this review helpful.
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  • 12AU7 cuts feedback on harp amp

    As reviewed by Steve on 3/26/2009

    I changed out a 12AX7 Groove Tube for the 12AU7 to cut back on the feedback of my tube amplifer that I use for blues harmonica. It did the trick--simple as that.

    6 of 7 people found this review helpful.
    Was this review helpful?
Questions about the Gold Series GT-12AU7 Preamp Tube (100200658)


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