RUBY TU6V6GTCZ MQ Other sku-1763689318 Vacuum Tubes

RUBY TU6V6GTCZ MQ, color Other, sku-1763689318, UPC 837410002139, is an All Vacuum Tubes listing titled as a matched quad. The description calls it a matched pair of Ruby 6V6GC beam tetrode power tubes for 15 to 22-watt amps. Associated with the "Tweed" sound, these tubes are described as breaking up smoothly at lower levels, with tight bass and a comfortable, non-spiky high end.

The listing names the Fender Deluxe and Princeton, Marshall DSL15, Orange Rockerverb and low-wattage boutique amps as examples for replacement. Ruby labels its power tubes with matching measurements for transconductance and plate current; the description says matching those parameters supports long tube life and performance.