From Applied Microphone Technology (AMT), the M40 microphone is every bit as revolutionary in it's profile as it is in sound quality. Primarily designed for capturing piano, the M40 is also ideal for boundary style layer capturing in conferences and stage performances. The condenser microphone features a cardioid polar pattern and rests on an attached surface, enabling the entire microphone to be placed flat on top of a piano's sound board.

Sound board placement results in a detailed, transparent signal reproduction seldom achieved with traditional piano miking techniques. The cardioid polar pattern is effective in minimizing off-axis noise and ambient audio signal. The M40 is powered via an external phantom power supply source or 9-volt battery and an attached 5-foot cable is wired to the external power supply/output stage. The output stage features a standard 3-pin XLR male output connection. The rugged, non-corrosive aluminum enclosure effectively protects the microphone from sudden shock.

The AMT B811 are a matched pair of cardioid condenser microphones suited for capturing drum overheads, stereo ambiance, piano and more. When used in pairs, the microphones accentuate cymbals accurately, while the cardioid pattern allows for a good rejection rate outside the perimeter. The B-811 operates on phantom power from 15 volts to 48 volts DC, an LED indicates status of power (on/off and voltage). The flat frequency response allows for a wide array of applications, the B811 is AMT's stereo piano solution.