The classic tube for 15–22-watt amps known for the "Tweed" sound, the 6V6 beam tetrode power tube is known for smooth breakup at lower levels, with a tight bass and mics and a comfortable, non-"spikey" high end. This matched pair of Ruby 6V6GC tubes is a premium replacement for amps like the Fender Deluxe and Princeton, Marshall DSL15, Orange Rockerverb and many low-wattage boutique amps. All Ruby power tubes are labeled with precise matching measurements for transconductance and plate current. Matching those parameters ensures long tube life and optimal performance.