GT-6V6-C Duet Classically designed with warm overdrive and soft distortion character. Chinese made copy of the old USA 6V6 we loved in our old Deluxe Reverbs. Round, warm, fat tone with lower power put great for a soft blues tone or great fat classic rock sound too. Classically designed with warm overdrive and soft distortion character. The newest version tooling of these 6V6 tubes are making them a favorite in many 6V6 amps. These tubes perform very well in the Fender Deluxe Reverb Reissue. Country of origin: RussiaCountry of origin: Russia