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Earthworks-PM40T Touring Piano Microphone System
The PM40T Touring PianoMic™ System, offering the features and sonic performance of our PM40 PianoMic™ System while offering quick, simple, and easy setup, in a compact airline friendly carry-on case.
The PM40T provides pristine sound quality regardless of whether the
piano lid is up or down. At the heart of the system are two Random
Incidence, omnidirectional, 40 kHz High Definition Microphones™. With a
frequency response of 4 Hz to 40 kHz, the mics deliver extraordinary
impulse response and extremely short diaphragm setting times. In
addition, the microphones exhibit no proximity effect, regardless of
their distance from the piano strings or soundboard. The mics, when
positioned close to the sound source, also provide incredible gain
before feedback. 
Place the microphones inside the piano shell, 3 to 6 inches above the
piano strings, to isolate the piano’s sound from sounds outside the
instrument and to prevent piano sound leakage. You can use the PM40T’s
adjustable, telescoping tube, which is supported by the sides of the
piano case, to place the microphones close to or away from the dampers
and get the exact
sound desired. The innovative PianoMic™ System required the design of unique high
definition microphones. Virtually all microphones used for recording
and sound reinforcement are “free field” microphones, designed to pick
up sounds in front of them. In contrast, the microphones in the
PianoMic™ System are actually placed within the sound field of the
piano, where sound is coming at the microphones from multiple sources
and multiple directions. Each string is a separate sound source and the
soundboard is also a sound source. In addition, there are multiple
reflections of each sound source from the soundboard, piano sides and
piano lid. These reflections, arriving from different angles, create
what is known as a “diffuse sound field.” A “random-incidence”
microphone is designed to be placed within such a diffuse sound field
and pick up sounds uniformly, whether they arrive at the front, the
sides or the rear of the microphone. The PianoMic™ System achieves much
of its remarkable performance through the use of specially designed,
40kHz random-incidence High Definition Microphones™.
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