Studio 10 KT-88 is driven by the monumental KT-88 power amp valve and an ECC83 in the preamp stage. Benefitting from the extra headroom of the KT-88, the Studio 10 KT-88 is the pinnacle of dynamic modern cleans and tight high-gain overdrives. In addition, the patented ISF control gives unparalleled access to more distortion flexibility than any other single-ended valve amplifier on the market.