Groove Tubes GT-67 Studio Tube Condensor Microphone Multi Pattern "Disk Resonator design naturally extends high frequencies to improve detail and depth on both vocal and instrument recordings Large dual-sided, multi-pattern 1.25"" (32mm) all brass capsule with a 1.04"" (26mm) ultra-thin 3 micron Gold evaporated Mylar diaphragm Hand-selected low noise USA-made vacuum tube in a special low noise Class A design 25' (7.6m) custom multicore low-capacitance, low noise mic cable w/NeutrikTM connectors Auto load-compensating PSM Power Supply for extended" "Large dual-sided, multi-pattern 1.25"" (32mm) all brass capsule with a 1.4"" (26mm) ultra-thin 3 micron Gold evaporated Mylar diaphragm" Hand-selected low noise USA-made vacuum tube in a special low noise Class A design "25' (7.6m) custom multicore low-capacitance, low noise mic cable w/NeutrikTM connectors" Auto load-compensating PSM Power Supply for extended cable runs