Features Slow-ramping heater voltage to ensure vacuum tube longevity New Old Stock Telefunken EF732 vacuum tube Custom-made BV8 output transformer 9-polar pattern functionality Description Product Description The Telefunken AK-47MKII Stereo Set is fully regulated and can power one or both microphones simultaneously and features a slow-ramping heater voltage to ensure vacuum tube longevity. The R-F-T AK-47 MkII began as a unique design to incorporate key elements of classic circuits such as the U47 and M49. These design decisions created a microphone with a wonderfully rich and warm low-mid frequency response ideal for vocals, bass (acoustic and electric), brass instruments, and drums. With these applications in mind, TELEFUNKEN Elektroakustik has developed the AK-47 MkII Stereo Set.