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Electro-Harmonix KT90EH Matched QUAD Cryoset Certified
Description
The Electro-Harmonix KT90EH is probably the best KT90 ever built. The KT90 is a replacement for 6550's and KT88's and will put out a little more power.
Cryoset Deep Cryogenic Treatment : The proprietary Cryoset treatment process utilizes a computer controlled, cryogenic chamber to very gradually reduce the temperature of the tubes to 300 degrees below zero (Farenheit) and holding them t for a minimum of 24 hours. After the extended dwell at this cryogenic temperature, the vacuum tubes are then very slowly brought up to ambient temperature over the next 24 hours and stabilized. The process is a "dry" one that utilizes Liquid Nitrogen as a cryogen that is flashed into the chamber. The tubes are never exposed to the actual liquid. All these processes are microprocessor controlled under strict and verifiable conditions.
These tubes have been cryo treated, given a 24 hour burn-in, and matched on the industry standard Maxi-Matcher at 400volts.
Condition
Units are in EXCELLENT condition. This Matched Quad (4 Tubes) of Electro-Harmonix KT90EH has been used less than 20 Hours.
Units are in EXCELLENT working condition and sound great.
Scroll down for high resolution photo.
Terms
Buyer to prepay for KT90EH Quad and packing/shipping/insurance.
Local pick up is welcome.
Actual units in photo.
Sold as is, with no further guarantee.
PayPal or Visa/Mastercard/AMEX thru PayPal accepted. Visa/Mastercard/Discover accepted directly also.
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