Are pairs or quartets in the webshop matched?

If you buy matched pairs, quartets, sextets or octets in our BTB webshop, they have been selected by us for the respective purpose according to practical parameters on the Roetest V11 (as of 2026), meaning they have been matched. During matching, we take into account all relevant values such as current, transconductance, grid currents, internal resistances and acoustic tests. Exceptions are tubes where factory matching is indicated. We have no influence on this matching.