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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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5.0

Good stuff

By Rick

from Durham , N C

About Me Professional Musician

See all my reviews

Verified Buyer

Pros

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

Cons

    Best Uses

    • Concerts

    Comments about Ruby ECC83 (12AX7A) Preamp Tube:

    Got my amp up and running like a New one.....

     
    3.0

    Average Tube

    By JAX 34

    from Nashville, Tennessee

    About Me Experienced

    See all my reviews

    Verified Buyer

    Pros

    • Easy To Use
    • Functional

    Cons

      Best Uses

        Comments about Ruby ECC83 (12AX7A) Preamp Tube:

        Average tube. It's a JJ with a sticker. It works but made no improvement in sound over the stock Chinese tube.

         
        5.0

        Sure

        By DDDon

        from Lincoln Alabama

        About Me Professional Musician

        See all my reviews

        Ask me a question

        Verified Buyer

        Pros

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

        Cons

        • none

        Best Uses

        • So I replaced them all. My amp is over 20 years
        • well a original tube went out on my Blue's Jr. s

        Comments about Ruby ECC83 (12AX7A) Preamp Tube:

        Well I unplugged my amp, took the back off and unplugged the old ones and plugged in the new. Pretty simple.

         
        4.0

        These are really not high gain tubes

        By thebigempire

        from Hot

        About Me Professional Musician

        See all my reviews

        Ask me a question

        Verified Reviewer

        Pros

        • Easy To Use
        • Functional
        • Good Quality

        Cons

          Best Uses

          • Backup
          • Concerts
          • Practicing

          Comments about Ruby ECC83 (12AX7A) Preamp Tube:

          Got these to replace GT's in my Mesa Stiletto that were road worn and trashed lots of live play over the last 18 months. I use Mesa's for recording and don't like to let them leave the house because of the cost. They do sound really good and I do like them in this amp but they are not high gain. I don't have a tube tester so I can't tell what the gain or plate voltage is but they sound more like ecc81's than ecc83's, so you will need a pedal in front to play metal good for hard rock though. They sound really good live with the amp up.

           
          4.0

          The old switcheroo

          By Rolandake77

          from Upstate, SC

          About Me Experienced

          See all my reviews

          Verified Buyer

          Pros

          • Easy To Use
          • Good Quality

          Cons

            Best Uses

            • Backup

            Comments about Ruby ECC83 (12AX7A) Preamp Tube:

            These tubes work fine, but they were actually JJ tubes in the Ruby box. They are both the same price, so I'm okay with the fact they were not what I ordered. No noticeable difference in sound, though. I had factory installed Chinese tubes in my Tiny Terror combo before the change.

            (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.

              (1 of 1 customers found this review helpful)

               
              5.0

              Works great!

              By Chris

              from Long Island, NY

              About Me Professional Musician

              Pros

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

              Cons

                Best Uses

                • Backup
                • Concerts
                • Practicing

                Comments about Ruby ECC83 (12AX7A) Preamp Tube:

                Vox AD120VTX was distorting and crackling. Replaced both original tubes which were Sovtek and Amp is nice and quiet now. There is no noticeable difference in sound from the original tubes. A great value.

                 
                5.0

                Great for Marshalls

                By BlackBelt

                from Memphis

                About Me Professional Musician

                See all my reviews

                Ask me a question

                Pros

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

                Cons

                  Best Uses

                    Comments about Ruby ECC83 (12AX7A) Preamp Tube:

                    I bought this to replace the preamp tube in my Marshall AVT50H amp head. Since NOS (new old stock) original tubes are up to 5 times the cost of this tube now, I needed a less expensive quality replacement for my amp. This works perfectly and reduced the microphonic squeals and hums that the old tube was producing. Highly recommended for Marshalls.

                    (0 of 4 customers found this review helpful)

                     
                    1.0

                    fast delivery but expensive shipping

                    By broba

                    from sweden

                    About Me Professional Musician

                    Verified Buyer

                    Pros

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

                    Cons

                      Best Uses

                      • Concerts
                      • Practicing

                      Comments about Ruby ECC83 (12AX7A) Preamp Tube:

                      the price for the tubes was ok but shipping and custom cost was to high to make this a good buy.

                      (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.

                        Displaying reviews 1-10

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