The capsule is a 25mm dual-diaphragm design that provides 9 pickup patterns via a switch on the power supply. The gold-sputtered diaphragm measures 3 microns in thickness. The specs claim “Tube preamplifier circuitry with 6072 vacuum tube (a classic 12AT7 specially selected for low distortion, superior signal-to-noise ratio and minimum sensitivity to mechanical vibrations)”, but in most cases the tube is a 12AX7, which has performance characteristics inappropriate for the circuit. A common mod is to replace this tube with a true 12AY7/6072 type. Read more: http://recordinghacks.com/microphones/Nady/TCM1050#ixzz6iQmyfBPM