KT77 JJ Electronic Power Tubes

KT77 is a beam power pentode with an octal base. It can be used in most EL34 amplifiers. It has more power, fatter bass and more headroom than the EL34 and E34L while providing very detailed tones.

Available in

  • Singles
  • Matched Pairs
  • Matched Quads
SKU kt77jj
Brand JJ Electronics
Unit Of Measure ea

Bullett proof with audiophile performance

By: on 17 January 2024
I run a pair of Tube Technology Genesis Monoblocks with modified power supplies ( they have a habit of frying the PCB mount trans ) I have run EL 34 s of all types in these during the past 25 years or so with varying degrees of success in tonal and construction quality . All left some degree of compromise . Around 2+ years ago , I installed a matched quad in ea mono of the JJKT77 . The improvement at all levels is hard to comprehend . Bias stability is superior to any EL34 I have run . A check on bias every 6 months has shown stability to be very even in all valves and minimal decline in values . Sound presentation takes the best of the best EL34 mid , builds on that and has superior extension up and down ,( based on this system ). I ve been a valve audio buff for over 40 years , and categorically , these are the best valve experience at any level that I have had. . Sound sessions with my audio peers have left them as astonished as I first was . Suited superbly to Vinyl , but no complaints with digital formats either . I m happy to criticise when / where relevant , however in this case , I have no negative criticism . Just brilliant .

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