TR-2 Tube Ring 19-22mm fits B9A base types including ECC83 and common preamps

Golden Dragon tube rings by Duende Criatura considerably reduce distortion and self-oscillation from audio tubes. They have to be slid around the top part of the tube and where they reduce mechanical vibrations in the tube. The listener will notice improvement of three dimensional picture, a more controlled bass and cleaner soundstage. Small Tube Ring to fit: ECC83, EL84, EF86 etc Diameter: 19.5 - 22mm