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Applied Microphone Technology M40 Piano Microphone (with Preamp)

M40 Piano Microphone (with Preamp) is a Half-Omni Directional Cardioid Condenser Microphone with a 141 dB SPL and a 20 Hz to 20 kHz Frequency Response.


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MSRP: Old Price $589.00 Discounted Price $471.00 Save : $118.00 (20%)
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MSRP: Old Price $589.00 Discounted Price $471.00 Save : $118.00 (20%)
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The AMT M40 is Applied Microphone Technology's legendary piano microphone system. Designed, manufactured by hand, and distributed by AMT in the USA. The system is intended to set inside the piano normally between the 2nd and 3rd sound holes on the cast iron plate of a grand and fastened to the front bottom door of an upright piano.

Natural Sound
The M40 achieves the most natural sound possible out of a microphone. Mono in design, the system can be used with a flat EQ setting allowing plenty of gain before feedback all while maintaining the pure and natural sound that each different piano has. Applied Microphone Technology designs microphone specific for each instrument and does not adapt one microphone for many instruments.

Included Preamp
The M40 comes with the AP40 aluminum pre-amp and integrated circuit technology, which can be powered by phantom power or 9-volt battery and includes a hard-shell case. The M40 has been designed for piano but works equally well in other applications such as boundary layer micing (conference, stage).

No Microphone Stand Needed
The system allows the microphone to be used with the piano lid closed. Cumbersome microphone stands not needed, as the system is very compact with many possible placements. The M40 is the only system on the market that will allow a close-lid application successfully. It is capable of picking up subtle passages as well as sound pressure levels up to 141dB.

Rugged Construction
The M40's rugged construction of anodized aviation aluminum allows it to withstand high impact while being lightweight and non-corrosive. The signal from the AP40 or AP41 preamp can be split with frequencies rolled off in a specific way to create a stereo image. Please see the AMT B811's or the AMT 404's for a true stereo or three-microphone option for piano.


  • For use with a wide variety of grand and upright pianos
  • Achieves the most natural sound possible through a flat EQ setting
  • This system allows for the microphone to be used with the piano lid closed
  • Rugged construction of anodized aviation aluminum
  • Includes microphone preamp

Get your Applied Microphone Technology M40 Piano Microphone (with Preamp) today at the guaranteed lowest price from Sam Ash with our 45-day return and 60-day price protection policy.

Things You Will Get:

  • Small-Diaphragm Condenser Microphone
  • Microphone Preamp


by PowerReviews
Microphone Type Small Diaphragm Condenser
Polar Pattern Half-Omnidirectional
Frequency Response 20Hz-20kHz
Output Impedence 150 ohms
Dynamic Range (SPL) 141dB
Pad No
Low Cut Filter No
Body Color Yellow
Power Requirements 1 x 9 V
Weight 1.55 oz
Dimensions 1.5 x 2 inches (Dia.x L)
Model M40BP
Warranty Info:

M40 Piano Microphone (with Preamp)

The manufacturer's warranty covers parts for one year and labor for one year from date of purchase. The warranty excludes damage from misuse, abuse, and contains other exclusions.

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