KT88 / KT90 / KT120
KT88 BackgroundKT88 is a low distortion, high power tube developed specifically for audio.
The original GEC KT88 was introduced back in 1958. Today, there is a number of quality current production KT88 tubes for audio or guitar applications.
CompatibilityAll tubes listed below can be used in place of KT88 or 6550. KT90 is a higher-powered direct replacement of KT88, and KT120 is an even higher powered replacement.
KT88 is upwards compatible with 6550 tubes. You can use KT88 in place of 6550 in most cases.
KT88 Sets in StockWe carry KT88 tubes in sets of 2 (pair), 4 (quad), and 6 (sextet). Please inquire for octets (8 tubes). Our KT88 sets are burned-in for 24 hours for maximum stability, then precision matched. There is no extra fees for burn-in or matching.
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Electro-Harmonix KT88 provides excellent sonics at great pricing.
For audio applications, the KT88EH provides good detail, soundstage and controlled bass. For guitar and bass amps, these tubes provide plenty of power with clean headroom.
Price is for a matching pair.
Price is for a matched quad of KT88-EH
Price is for a matched sextet (six tubes) of KT88-EH.
King of the tubes is here!
This is the Russian re-issue of famous Genalex Gold Lion KT88 tubes. This tube has received excellent review for its gorgeous sonics and high quality constructions. Price is for a matching pair (two tubes).
Price is for a matching quad (4 tubes).
Price is for a matching sextet (6 tubes).
Made by JJ (formerly Tesla) in Slovakia, KT88-JJ is very rugged and heavily constructed. In audio application, KT88-JJ was noted to have very tight bass and very good imaging. The ruggedness makes it a good choice for gigging musicians as well. Inquire about matched sextets. Price is for a matching pair.
Price is for a matching quad of KT88-JJ.
Price is for a matching sextet (6 tubes) of KT88-JJ.
Svetlana KT88 is a solid performer and very consistently well made to tight tolerances.
Svetlana KT88 is a solid performer and very consistently well made to exact tolerances.
Used by McIntosh in their legendary MC2000 tube amp, SED KT88 is the top choice for audiophile application. The SED KT88 provides smooth mids, warmth and clarity with full bass response. Very well constructed excellent KT88. Price is for a matching pair.
Price is for a matched quad (set of 4 tubes) of SED KT88.
Brand new for 2004, Electro-Harmonix KT90 is a super-rugged substitution for KT88/6550. Excellent for Hi-Fi Audio with superb power handling. Price is for a matching pair (2 tubes).
Electro-Harmonix KT90 is a super-rugged substitution for KT88/6550. Excellent for Hi-Fi Audio. Price is for a matching quad (set of 4 tubes).
Price is for a matching sextet (set of 6 tubes).
KT100 is a heavily constructed version of KT88. Full splash of side getter. Very rugged and sounds comparable to other KT88s with excellent clarity.
Price is for a matching quad of KT100.
KT120 is a monster tube capable of generating more output than 6550, KT88 and even KT90. This is made possible by employing high current cathodes and large inner structure, making this tube taller by 0.5" (13mm) than KT88-EH.
KT120 is plug-in compaible with 6550, KT88 family of tubes, but does draw higher filament current (up to 0.3A each). Please check with your amp manufacturer before substituting with KT120.
Price is for a matched pair.
Price is for a matching quad (4 tubes) of TungSol KT120
With a massive plate dissipation of 70 watts, the Tung-Sol KT150 is the most powerful octal beam tetrode ever produced. A pair of KT150s can allow an amplifier with a power output approaching 300 watts to be built.
The Tung-Sol KT150 glass envelope is a special egg shaped balloon that was developed to improve thermal dissipation and maintain a superior vacuum for the best sound. The fact that the glass envelope has no flat sides means the Tung-Sol KT150 has no problems with microphonics.
Price for a single tube
Price is for a matched pair.
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