These tubes are SOLD
couple months, then put them back in the boxes and returned to the EL-34s. These tubes have been in temperature-controlled storage since 1991.
For those not familiar with KT-88s, they are drop-in replacements for EL-34s in any amp circuit. They sound somewhat more powerful than EL-34s, with more authoritative bass and a bit less tubey “sweetness.”
As these were originally 2 matched sets of 4/set, I will sell them in matched pairs; a matched quartet; or all 8.
Price: $25/tube, which includes paypal & shipping w/in CONUS.