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Ruby ECC83 (12AX7A) Preamp Tube 

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The Ruby Tubes ECC83 (12AX7A) Preamp Tube is a hand-picked Tesla with low gain and full, robust tone. Comes with a 6-month replacement warranty....Click To Read More About This Product

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OVERVIEW

Get that true Marshall tone!

The Ruby Tubes ECC83 (12AX7A) Preamp Tube is a hand-picked Tesla with low gain and full, robust tone. Comes with a 6-month replacement warranty.

FEATURES
  • Lower gain, full robust tone
  • Matched parameters for optimal performance and long life

Get your head together with some Rubys. Order today!

Reviews
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Review Snapshot

by PowerReviews
RubyECC83 (12AX7A) Preamp Tube
 
4.4

(based on 35 reviews)

Ratings Distribution

  • 5 Stars

     

    (23)

  • 4 Stars

     

    (7)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (2)

64%

of respondents would recommend this to a friend.

Pros

  • Easy to use (10)
  • Functional (9)
  • Good quality (9)
  • Improves sound (8)

Cons

No Cons

Best Uses

  • Concerts (6)
  • Back-up (5)
  • Practicing (5)
    • Reviewer Profile:
    • Professional musician (8), Experienced (6)

Most Liked Positive Review

 

Ruby ECC83 -- a less expensive JJ

In case you are unaware, Ruby does not actually make tubes. They package tubes from other manufacturers. The description describes this as a low gain Tesla. If you are looking for a low...Read complete review

In case you are unaware, Ruby does not actually make tubes. They package tubes from other manufacturers. The description describes this as a low gain Tesla. If you are looking for a low gain 12AX7, this is really not it. Ruby sells several 12AX7s and this is the higher gain of them. The lower gain versions are the Sino Chinese tubes from the Shuguang factory. This is a JJ branded Tesla from Slovakia. I've tried several tubes including the Russian EH and Sovteks and find the JJs to sound best and be most consistant. I've stopped wasting time and money tracking down vintage tubes and am very happy with the JJs for all of my bass and guitar amps. By the way, if you are going to buy a JJ, I think the Ruby is a better deal. As I said, it is a JJ in a Ruby box. It may be better than one in a JJ box because it is likely that Ruby pretests and picks only those that meet their standards. It is also cheaper. Go figure...
n/a
Good enough that I no longer feel the need to seek out vintage RCA, Raytheon, Philips, Telefunkens, etc.

I use these in my Hughes & Kettner units (BATT, Blues Master, Cream Machine & Metal Master) as well as my Fender Champion 600.
Great price for an excellent tube.

VS

Most Liked Negative Review

 

worst tube quality and performance

This tube tested and performed poorly right out of the box. Less performance than original junk tube it replaced. Tested at less than 40% on both tube testers and made the amplifier sound the...Read complete review

This tube tested and performed poorly right out of the box. Less performance than original junk tube it replaced. Tested at less than 40% on both tube testers and made the amplifier sound the worst it has ever. I will not buy this manufactures tubes again. I do not recommend.

Reviewed by 35 customers

Displaying reviews 1-10

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(13 of 14 customers found this review helpful)

 
5.0

Ruby ECC83 -- a less expensive JJ

By ShortScale

from New York, NY

See all my reviews

Ask me a question

Comments about Ruby ECC83 (12AX7A) Preamp Tube:

In case you are unaware, Ruby does not actually make tubes. They package tubes from other manufacturers. The description describes this as a low gain Tesla. If you are looking for a low gain 12AX7, this is really not it. Ruby sells several 12AX7s and this is the higher gain of them. The lower gain versions are the Sino Chinese tubes from the Shuguang factory. This is a JJ branded Tesla from Slovakia. I've tried several tubes including the Russian EH and Sovteks and find the JJs to sound best and be most consistant. I've stopped wasting time and money tracking down vintage tubes and am very happy with the JJs for all of my bass and guitar amps. By the way, if you are going to buy a JJ, I think the Ruby is a better deal. As I said, it is a JJ in a Ruby box. It may be better than one in a JJ box because it is likely that Ruby pretests and picks only those that meet their standards. It is also cheaper. Go figure...
n/a
Good enough that I no longer feel the need to seek out vintage RCA, Raytheon, Philips, Telefunkens, etc.

I use these in my Hughes & Kettner units (BATT, Blues Master, Cream Machine & Metal Master) as well as my Fender Champion 600.
Great price for an excellent tube.

(6 of 6 customers found this review helpful)

 
5.0

Amazing Tone

By RebelRocker'73

from Undisclosed

See all my reviews

Comments about Ruby ECC83 (12AX7A) Preamp Tube:

I just had to write a review on this tube. I bought it a while back to replace the stock pre-amp tube in my Marshall AVT 50 (2000 series).... The owner's manual for my Marshall stated over and over again,how great the factory installed tube is supposed to be. The gain structure was just too high,and turning the gain down made the amp sound too weak. I was just not able to get that full,vibrant,vintage tone. Until I installed the Ruby tube! Now,all is well. All of the rich harmonics are there. The full-bodied,robust sparkle now exudes from the amp. The gain structure and EQ are perfectly balanced. Even the reverb,which before was just,"so-so",is now comparable to any high-end reverb out there. If a much better sounding pre-amp tube is what you're looking for...GET THIS TUBE! You will be happy you did.
Best value and tone for the buck.

(3 of 10 customers found this review helpful)

 
3.0

Tube was mispackaged.....

By woody

from south carolina

About Me Experienced

Verified Buyer

Pros

  • Functional

Cons

    Best Uses

    • Backup

    Comments about Ruby ECC83 (12AX7A) Preamp Tube:

    Called Musicians Friend and they sent me another tube and it was marked the same too. Inside the "Ruby" tube packaging was a "JJ" tube with a small sticker marked Ruby 12ax7. The tube was a JJ ECC83S.....again, called Musicians Friend to tell them they were selling a JJ labeled tube that was in a Ruby tube package.

    (3 of 3 customers found this review helpful)

     
    5.0

    Try them, you will like them!!!!

    By Uncle Elmo

    from Riverside, California

    See all my reviews

    Comments about Ruby ECC83 (12AX7A) Preamp Tube:

    I put these in my old Blues Deluxe and it can alive!! TONT TONE TONE!! I replaced the GT tubes that Fender put in stock, they were microphonic. Rubys are great tubes for the money, I am now putting them in my Egnater to upgrde the stock tubes. I am very happy with the Rubys!!

    (3 of 3 customers found this review helpful)

     
    5.0

    Smooth, sweet, and warm... yummy!

    By t. curren

    from Arcata, CA

    See all my reviews

    Comments about Ruby ECC83 (12AX7A) Preamp Tube:

    The best tube is like the best color - it can be different for different people and everyone's right. I like a warm tone, full from the lows to the highs, with a "rounder," less harsh distortion. These tubes ended my search, and now I just play 'em. Good from rich jazz, through edgy blues, to pre-punk (think 1970's Stooges).

    (2 of 3 customers found this review helpful)

     
    1.0

    worst tube quality and performance

    By alex

    from MA

    About Me Professional Musician

    Pros

      Cons

      • Defnetly Worse Than Orig

      Best Uses

      • Tube Amplifier Use

      Comments about Ruby ECC83 (12AX7A) Preamp Tube:

      This tube tested and performed poorly right out of the box. Less performance than original junk tube it replaced. Tested at less than 40% on both tube testers and made the amplifier sound the worst it has ever. I will not buy this manufactures tubes again. I do not recommend.

      (2 of 3 customers found this review helpful)

       
      2.0

      ruby ECC83s

      By admi

      from soky

      About Me Experienced

      Verified Buyer

      Pros

      • Easy To Use
      • Very Quiet

      Cons

        Best Uses

          Comments about Ruby ECC83 (12AX7A) Preamp Tube:

          these tubes are marketed for hard rock / metal and after installing, my gain, distortion, and sustain were all markedly reduced. my rig sounds nothing like it did before.

          (2 of 2 customers found this review helpful)

           
          5.0

          Simply excellent quality tubes

          By Diamond Dave

          from Dallas, TX

          About Me Experienced

          Pros

          • Affordable
          • Good Quality
          • Improves Sound
          • Low Microphonics

          Cons

          • None so far

          Best Uses

          • Preamp

          Comments about Ruby ECC83 (12AX7A) Preamp Tube:

          I purchased the AC5 HG+ version of the Ruby 12AX7 for the V1 position in my Hughes & Kettner head (used a Ruby 7025 SS in V2), and it truly improved the sound over the stock tubes, with improved harmonics and more clarity in pick-attack. The sound improvement was CLEARLY noticable...which I didn't expect.

          The Ruby's were my third and final choice, previously trying both Tung-Sol and Mullard reissues with unimpressive results on the overdrive. The Tung-Sol did sound a little sweeter on the clean channel, but I preferred the Ruby tubes for distortion...and that is what I'm playing 85% of the time.

          Yes, as others here have mentioned, these are re-branded JJ tubes...but I dont think you can find a better quality, low-microphonic tube for the money. For me, a product rating is either "Thumbs Up" or "Thumbs Down", based solely on if I would buy it again...and I would absolutely buy the Ruby tubes again!!

          But as Dennis Miller used to say..."Of course, that's just my opinion, I could be wrong."

          (2 of 2 customers found this review helpful)

           
          5.0

          Great tube for high-gain amps.

          By Bridge

          from Brookhaven, MS

          About Me Experienced

          Verified Buyer

          Pros

          • Improves Sound

          Cons

            Best Uses

            • Backup
            • Concerts
            • Practicing

            Comments about Ruby ECC83 (12AX7A) Preamp Tube:

            Recently I purchased some 12AX7 Tung-Sols for an SL+ module for my Randall RM1250H. While they did breathe life back into the preamp, it was a bit TOO warm for what I hoped the module would do. So, I sent it to Jaded Faith Mods for a complete overhaul. The owner of the company made the suggestion that I try Ruby tubes instead for gain purposes. When I confirmed this with my cousin who has great experience with tubes he agreed, saying that Sovtek would probably be too noisy for my taste while Ruby was just noisy enough without being overbearing. They were both absolutely right. The Sl+ was converted into the "Bed of Nails #1" module (unofficially dubbed "The Marshall from Hell") & it sounded wonderful with the Tung-Sols still installed, but when I put the Ruby tubes in....the sound I was looking for began to present itself. The Jaded Faith "Bed of Nails #1," with the help of Ruby tubes, gives my Salvation Mods "Camerock" a run for its money (and that's saying a lot.)

            (2 of 2 customers found this review helpful)

             
            5.0

            Old Marshall Tone

            By FunkMAN-q4e9K

            from NY

            See all my reviews

            Comments about Ruby ECC83 (12AX7A) Preamp Tube:

            I purchased for my Marshall Plexi remake 1969 100watt head. I have had this retube several times in the past ten years yet this one tube made the amp sound sweeter adn more retro than ever before. I am ordering several more for sure..

            Displaying reviews 1-10

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