Electro-Harmonix KT88EH Power Vacuum Tube (Matched)

3 Reviews

Availability: Usually ships within 24 hours.

USD $‎72.95

Need matched power tubes? Don't worry! Price includes matching in any quantity you need for no extra charge. Need a matched pair? Just order "2" tubes. For a matched quad order "4" tubes. Matched sextets and octets are available as well.

The Electro-Harmonix KT88EH Vacuum Power Tube provides a sweet top end while the peak power is extended to improve low frequency response. A specialized glass formula bottle ensures long life and improved reliability. The perfect choice when the authentic sound is needed.

Other Electro-Harmonix tubesKT88 Tube Types

Additional Information and Downloads

Tube Matching Information:
Power Tube Matching FAQ
Perfect Pair System

Electro-Harmonix KT88EH Datasheet (PDF)

Download Adobe Acrobat PDF reader

Warranty Information and Return Policy

Warranty Period: 3 months

All our tubes are guaranteed for 3 months from the date of purchase. (Any exceptions will be noted on that tube's Warranty tab)

If you receive a tube that does not perform to the manufacturer's specifications, please do the following:

- contact us to get a return authorization
- return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.

Returns not related to warranty or defect will be considered at our discretion, and are subject to a 15% restocking fee.

We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.

These guidelines may be updated without notice.

Ratings & Reviews

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Electro-Harmonix KT88EH | Beautiful sound the depth is beyond description


I bought 2 matched pairs of EH-KT88 from tonal to replace stock EL34's - after bias & break in I absolutely have no fancy words to describe the full depth of music, amazing & rich the sound, I am beyond impressed for the price - used in GA348 manual bias amp with Infinity RSIIIA speakers, dual velodyne subs one per channel - room +/- 500sqft - bias currently set at 0.5v - subs on 50hz & 40% vol I could go lower but like to shake.

Electro-Harmonix KT88EH | Vintage sunn1000s with kt88s


Used them in my sunn 1000s guitar amp took a little bit more time to break in the EH-KT88 tubes. Lasted for over 7 years until they went on Me? Using a sunn cabinet with 6 12 inch Pyle driver vintage 1980s speakers. 155 watt max. total 930watts. Amp on 10 with tube screamer hit 120db!! Massive power will buy again.



Excellent selection on the KT 88 valve, You cannot go Wrong , My Current MUSIC ANGEL Mark III M9 Uses EL34, And I got a Technician By The Name of Mr: Peter Gay Who Woked for JBL and HARMON Kardon & ALTEC LANSING, Will be Changing The Bases and The Caps + The Valves and May also Change The Transformer if Required to Accept The KT 88 Tube . This will be a Costly Affair. But well worth it.
Kind Regard's
Francis Jansz