KT88 Vacuum Tubes > KT-88 / KT90 / KT120 Pairs, Quads - BOI AudioWorks from BOI AudioWorks
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KT88 / KT90 / KT120

KT88 tube sets in stock

KT88 Background

KT88 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.

Compatibility

All 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 Stock

We 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.

Electro-Harmonix

KT88-EH Matched Pair

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.

In stock
KT88-EH Matched Pair Buy Now $61.00

Electro-Harmonix

KT88-EH Matched Quad

Price is for a matched quad of KT88-EH

In stock
KT88-EH Matched Quad Buy Now $122.00

Electro-Harmonix

KT88-EH Matched Sextet

Price is for a matched sextet (six tubes) of KT88-EH.

Available to order
KT88-EH Matched Sextet Buy Now $183.00

Genalex

KT88 Gold Lion Matched Pair

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).

In stock
KT88 Gold Lion Matched Pair Buy Now $105.00

Genalex

KT88 Gold Lion Matched Quad

Price is for a matching quad (4 tubes).

In stock
KT88 Gold Lion Matched Quad Buy Now $210.00

Genalex

KT88 Gold Lion Matched Sextet

Price is for a matching sextet (6 tubes).

In stock
KT88 Gold Lion Matched Sextet Buy Now $315.00

JJ/Tesla

KT88-JJ Matched Pair

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.

In stock
KT88-JJ Matched Pair Buy Now $80.00

JJ/Tesla

KT88-JJ Matched Quad

Price is for a matching quad of KT88-JJ.

In stock
KT88-JJ Matched Quad Buy Now $160.00

JJ/Tesla

KT88-JJ Matched Sextet

Price is for a matching sextet (6 tubes) of KT88-JJ.

Available to order
KT88-JJ Matched Sextet Buy Now $240.00

Svetlana

KT88-SV Matched Pair

Svetlana KT88 is a solid performer and very consistently well made to tight tolerances.

In stock
KT88-SV Matched Pair Buy Now $72.00

Svetlana

KT88-SV Matched Quad

Svetlana KT88 is a solid performer and very consistently well made to exact tolerances.

In stock
KT88-SV Matched Quad Buy Now $144.00

SED/Winged-C

KT88-WC Matched Pair

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.

Sold out - Please inquire
KT88-WC Matched Pair

SED/Winged-C

KT88-WC Matched Quad

Price is for a matched quad (set of 4 tubes) of SED KT88.

Sold out - Please inquire
KT88-WC Matched Quad

Electro-Harmonix

KT90-EH Matched Pair

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).

In stock
KT90-EH Matched Pair Buy Now $85.00

Electro-Harmonix

KT90-EH Matched Quad

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).

In stock
KT90-EH Matched Quad Buy Now $170.00

Electro-Harmonix

KT90-EH Matched Sextet

Price is for a matching sextet (set of 6 tubes).

In stock
KT90-EH Matched Sextet Buy Now $255.00

Valve Art

KT88-VA (KT100) Matched Pair

Price is for a matched pair of Valve Art KT88 or KT100 Please note that starting a couple of years back, ValveArt (Shuguang) has labeled the same tube as KT88, KT88-98 or KT100.

In stock
KT88-VA (KT100) Matched Pair Buy Now $88.00

Valve Art

KT88-VA (KT100) Matched Quad

Price is for a matched quad of Valve Art KT88. Please note that starting a couple of years back, ValveArt (Shuguang) has labeled the same tube as KT88, KT88-98 or KT100.

In stock
KT88-VA (KT100) Matched Quad Buy Now $176.00

TungSol

KT120-TS Matched Pair

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.

In stock
KT120-TS Matched Pair Buy Now $89.50

TungSol

KT120-TS Matched Quad

Price is for a matching quad (4 tubes) of TungSol KT120

In stock
KT120-TS Matched Quad Buy Now $179.00

TungSol

KT150-TS

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

In stock
KT150-TS Buy Now $86.00

TungSol

KT150-TS Matched Pair

Price is for a matched pair.

In stock
KT150-TS Matched Pair Buy Now $172.00
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