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The PM range of guitar tubes is a unique blend of proven vintage technology plus an intensive research development program covering all aspects of performance and production. The result? Tubes of unparalleled sound quality and reliability. That’s why PM are design consultants and tube suppliers to many of the biggest names in the music business for both guitar and high-end audio.


Why upgrade to PM Guitar Tubes?

Like guitar strings, tubes should be considered a consumable item!  When it comes to amplifier maintenance, some people are content to change their tubes when the existing set have burnt out -but this can cause damage and additional wear to other components.

In order to avoid your tone becoming muddy and lifeless (unless that is what you are aiming for!) and to keep your amp running at its best you need to replace your tubes regularly.  PM recommends replacing tubes at least every two years; the more often and aggressively you play, the faster your tubes will wear out.

The PM range was created to simplify re-valving an amp.  We have picked what we believe to be the best sounding and most reliable valves from current production.  



Drop in replacement for any factory fitted EL84 amplifier without the oversized glass problems from other manufacturers.  Freshen up your town with these extremely durable EL84 power tubes.  The improved plate construction of the EL84 gives impressive frequency response, deep bass, articulate mids and good highs.  More power and wider dynamics than the original EL84's!  


  • Sold in matched duets (qty 1 is 2 tubes)
  • 1 is full replacement on Diamond Positron/Assassin heads
  • Order 2 for a matched quad


Tagged: Dbz, Dbz/diamond, Diamond, Diamond amps, Tubes

Type: Tube


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