Classis BM 34 B (Discontinued)

The Classis BM 32 / 33 / 34 condenser boundary microphones have been designed for flush mounting into tabletops or ceilings. The microphones have been designed for applications such as tele/videoconferencing, recording or amplification of round table discussions and wherever the microphone needs to be as unobtrusive as possible.

The Classis BM 34 has a half-cardioid polar pattern, which increases the gain-before-feedback and decreases the amount of diffuse ambience. The Classis BM 34 is provided with a bass roll-off filter.

The high sensitivity guarantees a constant output level even from long distance sources. Elastic bearing rings achieve mechanical isolation from the mounting surface and therefore offer effective sound isolation of the microphone.

Features:

Half-cardioid polar pattern
Flat, wide range frequency response
High-quality reproduction of speech
Unobtrusive design
Ceiling or tabletop mounting
Fast and easy installation

Specifications:

Transducer type. . . . . . . . . . . . . . . . . . . . . . . . . . Condenser
Frequency response. . . . . . . . . . . . . . . . . . . . . . . 150 - 18,000 Hz
Polar pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . Half-cardioid
Open circuit voltage
at 1 kHz (0 dB = 1 V/Pa) . . . . . . . . . . . . . . . . . . . 19 mV/Pa = -34.4
Nominal impedance . . . . . . . . . . . . . . . . . . . . . . < 200ohm
Load impedance . . . . . . . . . . . . . . . . . . . . . . . . . ‚1 k ohm
S/N ratio rel. to 1 Pa . . . . . . . . . . . . . . . . . . . . . . 60 dB
Equivalent SPL . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 dB
Phantom supply . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 52 V
Current consumption . . . . . . . . . . . . . . . . . . . . . 3.4 mA
Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-pin XLR
Weight (with nut and bearing rings) . . . . . . . . . . approx. 85 g [0.19 lbs]