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#212031 000000186

Ruby EL84CZ Premium Matched  Quartet

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A premium tube that produces more power, more tone, and higher fidelity with an extended dynamic range. All Ruby output tubes are labeled on the base...Read More

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Quartet  
  • Quartet

    $39.99 Best Seller

    In stock

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  • Duet

    $21.99 Best Seller

    In stock

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      OVERVIEW

      A premium tube that produces more power, more tone, and higher fidelity with an extended dynamic range. All Ruby output tubes are labeled on the base with the exact matching measurements for plate current and transconductance. By matching these parameters, optimal performance and long life are ensured. Comes with a 6-month replacement warranty.

      The most powerful EL84CZ available!

      FEATURES
      • Labeled with matching measurements for plate current and transconductance
      • Optimal performance and long life
      Reviews
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      Review Snapshot

      by PowerReviews
      RubyEL84CZ Premium Matched
       
      3.9

      (based on 7 reviews)

      Ratings Distribution

      • 5 Stars

         

        (3)

      • 4 Stars

         

        (2)

      • 3 Stars

         

        (0)

      • 2 Stars

         

        (2)

      • 1 Stars

         

        (0)

      67%

      of respondents would recommend this to a friend.

      Pros

      No Pros

      Cons

      No Cons

      Best Uses

      No Best Uses
        • Reviewer Profile:
        • Experienced (3)

      Reviewed by 7 customers

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      Displaying reviews 1-7

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      4.0

      Great tubes for the money

      By 

      from Cleveland, OH

      About Me Experienced

      Verified Reviewer

      Pros

        Cons

          Best Uses

            Comments about Ruby EL84CZ Premium Matched:

            Replaced some very old JJ's with these. They are rebranded JJ's and sound slightly warmer, not as bright as the JJ's. A bit more mids and break up beautifully. For the price, these can't be beat.

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            5.0

            Ruby EL84CZ

            By 

            from Fox Lake, Il

            About Me Experienced

            Pros

              Cons

                Best Uses

                  Comments about Ruby EL84CZ Premium Matched:

                  Wanted a quad of JJs and this is the way to get that at MF. Got a cathode biased amp that is hard on output tubes. Ruby must test these good because they hold up. And they are JJs so they sound good. Me like. This is my second purchase of them.

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                  (1 of 1 customers found this review helpful)

                   
                  5.0

                  Ruby EL84CZ = JJ EL84

                  By 

                  from Raleigh, NC

                  About Me Experienced

                  Ask me a question

                  Verified Buyer

                  Pros

                    Cons

                      Best Uses

                        Comments about Ruby EL84CZ Premium Matched:

                        First, the RUBY EL84CZ set received are actually JJ labeled tubes with RUBY providing their matching/grading. I needed a set for my Fender PRO JR that original Sovtek's had drifted apart by 30% and were mechanically noisy (rattling). I had researched these RUBY tubes and knew they are actually JJ's and that was fine with me. The set received were perfectly matched (within 1ma) of each other. She is much quieter now with the new Ruby's vs. the worn Sovteks.

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                        (2 of 2 customers found this review helpful)

                         
                        2.0

                        poor quality control-average sounding

                        By 

                        from md

                        About Me Professional Musician

                        Ask me a question

                        Verified Buyer

                        Pros

                        • Easy To Use

                        Cons

                        • Not Functional
                        • Poor Quality

                        Best Uses

                          Comments about Ruby EL84CZ Premium Matched:

                          i received the tubes defective. When i put them in a blues jr. every time i started the amp a loud, high-pitched squeal was produced and then died. and at any volume that could be used for a band practice the amp would start to produce the same squeal, very different from anything i've heard from an amp. i put back in the old tubes and i could not reproduce the noise. so i believe there is a short or something inside the tube. go buy ehx tubes they seem to be consistent for me at least and a better sound.

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                          (2 of 2 customers found this review helpful)

                           
                          5.0

                          fantastic

                          By 

                          from Undisclosed

                          Comments about Ruby EL84CZ Premium Matched:

                          Well, I had to replace the old tubes in my Marshall, so i got this. I was entirely satisfied. I noticed the volume of my amp drastically increased. They can get a really good sound, I'm sure there are better, but this tube is solid.

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                          (2 of 2 customers found this review helpful)

                           
                          4.0

                          ruby el84 tube swap

                          By 

                          from metro detroit area

                          Comments about Ruby EL84CZ Premium Matched:

                          i swapped a ruby el84 tube for the sovtek el84 that came in my epiphone valve junior amp. what an absolute step up ! louder volume, clean/crisp tone. if u have an EVJ do yourself a favor and put in of these smokin' hot tubes

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                          (4 of 5 customers found this review helpful)

                           
                          2.0

                          What am I supposed to do with this!!!?

                          By 

                          from Nashville, TN

                          Comments about Ruby EL84CZ Premium Matched:

                          The word that keeps coming to mind is UNINSPIRING. Tried in a Pro Junior and Mesa Boogie Maverick, the tube didn't have the SLIGHTEST bit of clarity. You can tell it is a well MADE tube- no undue compression and it had solid low end, but that's where the compliments stop. The tube made each amp (while using humbuckers, P-90's, Tele, and Strat pickups) sound like it was clogged up in the all-important mids- not much of a value. I'm going with the Electro-Harmonix offering.

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                          Displaying reviews 1-7

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