TAD Red Base KT88. PREMIUM SELECTED TUBE RED BASE KT88 (4) FACTORY FACTORY MATCHED. Our favourite Tube in the KT88 / 6550 Class. A very musical response, with great sound and finest details in mids and top-end; a linear and harmonious overall response with a very organic tone, make the TAD KT88-STR REDBASE our favourite tube in the KT88 and 6550A class.
eBay