KT88 / KT90 from BOI AudioWorks
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KT88 / KT90

KT88/KT90 from BOI AudioWorks All KT88 tubes we sell are burned-in for 24 hours and carefully matched on our custom test equipments.


All tubes listed below replaces KT88. KT90 is a higher-powered direct replacement of KT88.
KT88 is also upwards compatible with 6550 tubes.

KT88-EH Matched Pair

Electro-Harmonix $61.00
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.

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KT88-EH Matched Quad

Electro-Harmonix $122.00
KT88-EH Matched Quad

Price is for a matched quad of KT88-EH

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KT88-EH Matched Sextet

Electro-Harmonix
KT88-EH Matched Sextet

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

Out of stock

KT88 Gold Lion Matched Pair

Genalex $105.00
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).

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KT88 Gold Lion Matched Quad

Genalex $210.00
KT88 Gold Lion Matched Quad

Price is for a matching quad (4 tubes).

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KT88 Gold Lion Matched Sextet

Genalex $315.00
KT88 Gold Lion Matched Sextet

Price is for a matching sextet (6 tubes).

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KT88-JJ Matched Pair

JJ/Tesla $80.00
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 imaing. The ruggedness makes it a good choice for gigging musicians as well. Inquire about matched sextets. Price is for a matching pair.

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KT88-JJ Matched Quad

JJ/Tesla $160.00
KT88-JJ Matched Quad

Price is for a matching quad of KT88-JJ.

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KT88-JJ Matched Sextet

JJ/Tesla $240.00
KT88-JJ Matched Sextet

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

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KT88-WC Matched Pair

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.

Out of stock

KT88-WC Matched Quad

SED/Winged-C
KT88-WC Matched Quad

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

Out of stock

KT88-WC Matched Sextet

SED/Winged-C
KT88-WC Matched Sextet

Price is for a matched sextet (set of 6 tubes) of SED KT88.

Out of stock

KT90-EH Matched Pair

Electro-Harmonix $75.00
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).

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KT90-EH Matched Quad

Electro-Harmonix $150.00
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).

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KT90-EH Matched Sextet

Electro-Harmonix
KT90-EH Matched Sextet

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

Out of stock

KT90-EI Matched Pair

Ei
KT90-EI Matched Pair

Ei KT90 is an excellent substitute for KT88 and 6550 in audiophile application. Provides excellent bass but with full dynamics in HiFi application. Price is for matching pair.

Out of stock

KT88-VA (KT100) Matched Pair

Valve Art $88.00
KT88-VA (KT100) Matched Pair

KT100 is a heavily constructed version of KT88. Full splash of side getter. Very rugged and sounds comparable to other KT88s with excellent clarity.

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KT88-VA (KT100) Matched Quad

Valve Art
KT88-VA (KT100) Matched Quad

Price is for a matching quad of KT100.

Out of stock

Stock and price may change without notice.
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