KT120 Tung-Sol Power Tubes

KT120 Tung Sol Power Pentode

Rated 5/5 based on 1 reviews.

Buying Options

Quantity Image Name Price
Matched Pair KT120 Tung Sol Matched Pair KT120 Tung Sol
In stock
Matched Quad KT120 Tung Sol Matched Quad KT120 Tung Sol
Back Order
Single KT120 Tung Sol Single KT120 Tung Sol
Back Order

KT120 Tung-Sol Power Tubes

The KT120 Tung-Sol Power Pentode has to be one of, if not the most powerful tube in production today. It has a plate dissipation of 60 watts, making it the most powerful tube in the 6550, KT88, KT90 family.

Here are the comparisons

  • KT120 = 60watts
  • KT90 = 50watts
  • KT88 = 42watts
  • 6550 = 30watts


A pair of KT120 tubes used in a push-pull configuration can deliver power levels of 150 or more watts.  

When used at the parameters found in existing 6550, KT88. KT90 circuits, the Tung-Sol KT120 is impervious to overload, delivering peak power with extreme reliability and long tube life.

However, taking advantage of the higher current handling capacity of these tubes, a very unique and super powerful and stable amp can be designed utilising the Tung-Sol KT120 and if used in circuits design for 6550-, KT88 or KT90, the KT120 will deliver unbelievable headroom.


SKU kt120ts
Brand Tung Sol
Unit Of Measure ea

This is a big tube in every way

10 January 2018
The tube is a relatively new tube I use in an Alessandro Redbone. It's a really loud amp so at low to medium volumes it offers significant clean headroom but warm overdrive is only a tweak away if you can and want to go past 2-3 on the volume dial. So excellent for home, studio and performance for a classic rock sound. It is too warm for straight jazz but comes alive when looking for wide range in tones and sweet harmonic distortion. This is a very big tube so is a pretty tight fit in the head and might not fit small amp heads. This makes input and removal a little tricky and the black plastic post broke off one - not a big deal but a little annoying.

Write a product review

Others Also Bought