Beyerdynamic CLASSIS BM 53 USB, Product Information

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Classis BM 53 USB – Boundary Microphone
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volume control can shift. Therefore check under
Control Panel / Sounds / Sound Recording if the
volume control for the microphone is still at the
selected position.
Maintenance
Use a soft, damp cloth for cleaning the surface. Take
care not to allow any water to enter the transducer
elements and do not use any solvent cleaners.
Service
Servicing must be carried out by qualified service
personnel only. Dismantling the microphone yourself will
invalidate the guarantee.
Version
Model Description . . . . . . . . . . Order #
Classis BM 53 USB black, with
USB cable, 3 m long. . . 729.469
Technical Specifications
Transducer principle. . . . . . . . Condenser
(back-electret)
Frequency response
(position linear). . . . . . . . . . . 40 - 20,000 Hz
Polar pattern. . . . . . . . . . . . . Semi-spherical
Level compensation. . . . . . . . . -10 dB, 0 dB, +10 dB,
switchable
Bass roll off (switchable). . . . . 150 Hz (6 dB/octave)
Operating modes. . . . . . . . . . . PTT, PTM, On/Off
Open circuit voltage. . . . . . . . -18 dBFs at 1 Pa/1 kHz
Dynamic. . . . . . . . . . . . . . . . . 73 dB(A)
Max. SPL. . . . . . . . . . . . . . . . 112 dB
Supply voltage. . . . . . . . . . . . . . 5 V via USB connection
Current consumption. . . . . . . . 27 mA when in use,
12.5 mA in sleep mode
Connection. . . . . . . . . . . . . . . USB socket, type B
Dimensions (L x W x H). . . . . . 105 x 76 x 25 mm
Weight without cable. . . . . . . . 155 g