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Groove Tubes Gold Series GT-EL84-S Matched Power Tubes High (8-10 GT Rating) Duet

Item #: 
1274034469217
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This GT-EL84-S Matched Power Tube Duet and Quartet features a new European version with even more response, higher power, and warmer tone. It's the low-power pentode popularized in the early Vox AC30 ... Click To Read More About This Product

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High (8-10 GT Rating) Duet
  • Medium (4-7 GT Rating) Duet

    $54.99 Top Seller

    In stock

  • In stock

  • Ships By 2/7/17

Price:
$5499.00

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Overview

This GT-EL84-S Matched Power Tube Duet and Quartet features a new European version with even more response, higher power, and warmer tone. It's the low-power pentode popularized in the early Vox AC30 amps. It was rediscovered by Matchless and now is used by nearly every tube amp company. It has a quick, soft overdrive distortion--great for recording but usually too low volume for live gigs.

Country of origin: Slovakia

Features
Specifications
  • Country of origin: Slovakia
Warranty
MANUFACTURER'S WARRANTY
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.


  • Customer Reviews
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Review Snapshot

by PowerReviews
Groove TubesGold Series GT-EL84-S Matched Power Tubes
 
3.8

(based on 10 reviews)

Ratings Distribution

  • 5 Stars

     

    (6)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (2)

Most Liked Positive Review

 

I'm happy

Tube amps just sound better imho. So it just makes sense not to scrimp on the main ingredient. When the tube manufacturers run a "batch" it's not uncommon to...Read complete review

Tube amps just sound better imho. So it just makes sense not to scrimp on the main ingredient. When the tube manufacturers run a "batch" it's not uncommon to have up to a 70% failure/out of spec rate depending on different circumstances so thank goodness we have the likes of GT, Ruby, TAD, and others to separate the bad ones for us.
I wanted to replace my tubes with a higher rating to get the best clean headroom from a lower wattage amp. I already knew I preferred JJ's which sound the best[to me] of the current production el84's. I recieved a pair of "8"s and they did what I wanted.
GT thoroughly tests their tubes. You have the responsibility to get the bias adjusted properly or any output tube....even GT's will prematurely fail. Have a tech do it if you can't because there's enough residual juice in a tube amp[even with the power cord unplugged] to fry you. Once this is done it should be OK as long as you replace the next set with the same # you have in the amp without a re-bias[though it's always nice to do it every time regardless]. This is an advantage if you pop a tube at a gig as long as you carry extra tubes and fuses but don't have the time to bias.
You are paying a premium for GT to match the tubes,check for microphonics,transconductance,etc. It's worth it to me for the peace of mind and it makes your amp run better and longer. Output transformers can run up to 20% cooler and closely matched tubes just last longer when they "share" the burden equally.

VS

Most Liked Negative Review

 

Microphonic :/

I bought a pair of these and 3 Groove tube 12AX7-C at the guitar center in Las Vegas to replace the original Groove tube/Sovtec tubes in my Blues Jr. For the first...Read complete review

I bought a pair of these and 3 Groove tube 12AX7-C at the guitar center in Las Vegas to replace the original Groove tube/Sovtec tubes in my Blues Jr. For the first hour or so of opperation, I had THE BEST tone I could possibly imagine. I was amazed. But after that first hour, they started getting more and more harsh sounding. After about 2 weeks, i started noticing microphonics. Now after just under 2 months, I pulled them out to test them against some JJ's and noticed two of the 3 preamps were microphonic (rattle) and one of the EL84's was too. I thought microphonics only happened in preamps? The LV store manager said they would have to contact Groove Tube to see if they will replace them for me. I hope Groove Tubes steps up to the plate.... I paid top dollar for these "premium" tubes.

Reviewed by 10 customers

Displaying reviews 1-10

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5.0

Awesome sound

By Ricky White

from Pelham, AL

Comments about Groove Tubes Gold Series GT-EL84-S Matched Power Tubes:

When I had to replace the tubes in my Crate V30 combo amp, I replaced with inexpensive tubes. The sound was very bright and I couldn't compensate enough with my amp eq. It was either overly bright or muddy. Replaced the tubes again with groove tubes(the same type that was in the amp originally) and man, what a difference. Love my amp's tone again. The groove tubes cost a lot more, but there were definitely worth the price. Very smooth sound.

(5 of 5 customers found this review helpful)

 
5.0

Same as JJs

By Shoegazer57

from Chicago

About Me Experienced

Comments about Groove Tubes Gold Series GT-EL84-S Matched Power Tubes:

These are as good as you'll find in current manufactured tubes. You may find them expensive compared to other vendors' matched JJ pairs, but you are assured by GT that the quality control and matching are done right.

(1 of 1 customers found this review helpful)

 
2.0

Microphonic :/

By Vance Allred

from St. George

Comments about Groove Tubes Gold Series GT-EL84-S Matched Power Tubes:

I bought a pair of these and 3 Groove tube 12AX7-C at the guitar center in Las Vegas to replace the original Groove tube/Sovtec tubes in my Blues Jr. For the first hour or so of opperation, I had THE BEST tone I could possibly imagine. I was amazed. But after that first hour, they started getting more and more harsh sounding. After about 2 weeks, i started noticing microphonics. Now after just under 2 months, I pulled them out to test them against some JJ's and noticed two of the 3 preamps were microphonic (rattle) and one of the EL84's was too. I thought microphonics only happened in preamps? The LV store manager said they would have to contact Groove Tube to see if they will replace them for me. I hope Groove Tubes steps up to the plate.... I paid top dollar for these "premium" tubes.

(4 of 4 customers found this review helpful)

 
5.0

I'm happy

By gamjamm

from Havre De Grace, Md.

Comments about Groove Tubes Gold Series GT-EL84-S Matched Power Tubes:

Tube amps just sound better imho. So it just makes sense not to scrimp on the main ingredient. When the tube manufacturers run a "batch" it's not uncommon to have up to a 70% failure/out of spec rate depending on different circumstances so thank goodness we have the likes of GT, Ruby, TAD, and others to separate the bad ones for us.
I wanted to replace my tubes with a higher rating to get the best clean headroom from a lower wattage amp. I already knew I preferred JJ's which sound the best[to me] of the current production el84's. I recieved a pair of "8"s and they did what I wanted.
GT thoroughly tests their tubes. You have the responsibility to get the bias adjusted properly or any output tube....even GT's will prematurely fail. Have a tech do it if you can't because there's enough residual juice in a tube amp[even with the power cord unplugged] to fry you. Once this is done it should be OK as long as you replace the next set with the same # you have in the amp without a re-bias[though it's always nice to do it every time regardless]. This is an advantage if you pop a tube at a gig as long as you carry extra tubes and fuses but don't have the time to bias.
You are paying a premium for GT to match the tubes,check for microphonics,transconductance,etc. It's worth it to me for the peace of mind and it makes your amp run better and longer. Output transformers can run up to 20% cooler and closely matched tubes just last longer when they "share" the burden equally.

(4 of 9 customers found this review helpful)

 
1.0

Save your money

By R. Frank Jones

from Nevada

Comments about Groove Tubes Gold Series GT-EL84-S Matched Power Tubes:

I'm giving a low rating due to the poor quality of the product.
As for features, Groove Tubes offers better selection of types that relate to your individual sound preferences.
Aye, there's the rub... I bought a quartet of Gold EL84's for my Carvin BelAir 212 at the end of May, 2011. It is now mid-September & the tubes have failed. So far I've used the amp on less than a dozen gigs, all within 100 miles of my home, so no long road vibes. Considering the hype Groove Tubes makes for their grading & quality, this is very poor bang for the buck!
I won't purchase Groove Tube products ever again.

(4 of 4 customers found this review helpful)

 
4.0

If you dont already know

By Solerso68

from Maryland

Comments about Groove Tubes Gold Series GT-EL84-S Matched Power Tubes:

These tubes are JJ's. JJ makes some pretty good tubes. This GT EL84 (made by JJ)has plates and getters that look EXACTLY like some of the late dutch made Phillips tubes. They dont sound as good as dutch made Phillips tubes though, they dont sound terrible. They are very sturdy tubes anyway.

(3 of 3 customers found this review helpful)

 
5.0

Excellent Tubes!

By Johnny Bloom

from Modesto, CA

Comments about Groove Tubes Gold Series GT-EL84-S Matched Power Tubes:

These are truly great-sounding tubes. I use them in my vintage Harmony amps and they are far superior to the others I've tried. Very smooth, musical and sweet. With the prices of NOS tubes rising while the quality drops, I'll never throw away any more money on questionable old parts while these Groove Tubes are available.

(2 of 2 customers found this review helpful)

 
5.0

Amazing tubes

By DogBert

from Canada

Comments about Groove Tubes Gold Series GT-EL84-S Matched Power Tubes:

well i bought the tubes and when i got them installed i was hearing a completely different amp. the tone and sustain was absolutely amazing these are high end tubes and i've never heard better

(3 of 3 customers found this review helpful)

 
5.0

Great tube

By Just me-Su.Ci

from Kenosha, WI

Comments about Groove Tubes Gold Series GT-EL84-S Matched Power Tubes:

I've been using this tube in my Mesa Boogie Studio Caliber amp for the past 2-3 years under regular gigging use. It has stood up to many, many gigs and is rock solid. It is LOUD, clear, and very articulate. It is not just a recording amp tube, this thing screams.

(4 of 13 customers found this review helpful)

 
1.0

save your money

By DTE3

from Des Moines, IA

Comments about Groove Tubes Gold Series GT-EL84-S Matched Power Tubes:

Do not believe the "matched" hype -- you are better off to buy the cheaper, competing, tubes and test them yourself -- in your particular amp. Groove tubes' testing procedures must be nonexistent. I bought four these things and they sound worse than unmatched tubes costing 1/2 the price. Your best bet is to avoid GT tubes !

Displaying reviews 1-10

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