Beyerdynamic CLASSIS BM 53 USB, Product Information

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Classis BM 53 USB – Boundary Microphone
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How to set the Frequency Response
The frequency response mode is set by a slide switch .
• Position Lin . (up):
linear frequency response for highest fidelity of
reproduction. This is the normal position.
• Position 150 Hz (down):
bass roll-off-filter of 150 Hz with 6 dB/octave to
reduce low-frequency noise. This is useful in live
rooms or in noisy surroundings.
How to select the Gain
The desired gain is set by the right hand rotary switch
with an appropriate screwdriver.
-10 dB: for loud speakers and/or when the distance
between speaker and microphone is short
0 dB: for normal applications
+10 dB: for quiet speakers and/or when the distance
between speaker and microphone is large
Operation with a PC
In order to record meetings place the microphone e.g. in
the middle of the table. As the Classis BM 53 USB is a
semi-spherical acoustical boundary microphone that
picks up sound from all directions it is not necessary to take
care for a special pickup direction.
• Make sure that the microphone is not placed too close
to the PC so that the recording is not disturbed by
noise caused by the keyboard and/or mouse.
• Connect the microphone with the supplied USB cable
to your PC. When connecting the cable to the micro-
phone, make sure that the USB symbol of the cable
plug points to the top. The supplied USB cable of the
type B is 3 m long. If you need longer cables, you
must use
active USB-Repeater cables, which can be
obtained at computer shops. With active extension
cables a
maximum length of 20 m is possible.
Classis BM 53 USB
Rear