Konstantinos Kampanis' main instrument is an original Ivan Kaloferov cello, model "Stradivari-Piatti". It was manufactured in 1976 in Bulgaria and won first prize in the New York international instrument competition on the same year.
Ivan Kaloferov (1906 - 1985) was the founder of the Bulgarian School for Violin making. Awards - winner of many prestigious competitions at home and abroad. Founding member of the Violin making Association by the Musicians Union and his Chairman for many years. Member of the Jury at the International competition in Liege (Belgium), 1972. Honorary quest at the "Wieniawsky" competition, Poznan (Poland), 1977.
Konstantinos Kampanis' cello can be heard on various recordings:
Konstantinos also has a second instrument. It's a Russian hand-made cello that his father bought for him in the mid-90s, on one of his trips to Moscow. When in need for a more modern or experimental sound, Konstantinos uses a Barcus-Berry Piezo Transducer with Preamp, routed to a multi-effect unit.