Earthworks M30 Bruksanvisning

Earthworks mikrofon M30

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Technical Support
Should you have any questions regarding your
M30 microphone please contact us:
e-mail: Support@EarthworksAudio.com
phone: 1-603-654-6427 (9a.m. – 5p.m. ET)
For warranty and product return/exchange
information please refer to the back of the
enclosed Calibration Chart.
Earthworks, Inc.
37 Wilton Rd.
Milford, NH 03055 USA
Phone: 1-603-654-6427
Fax: 1-603-654-6107
http://www.EarthworksAudio.com
Made in U.S.A.
Made in U.S.A.
Made in U.S.A.
Made in U.S.A. Made in U.S.A.
M
M
M
MM30
30
30
3030 Measurement Microphone
Measurement Microphone
Measurement Microphone
Measurement Microphone Measurement Microphone
Owner
Owner
Owner
OwnerOwner’s Manual
’s Manual
’s Manual
’s Manual ’s Manual
Description
Earthworks M30 is an omnidirectional
(pressure) microphone designed and calibrated
for measurement purposes. It is a prepolarized
condenser microphone directly coupled to a
wideband, low output impedance preamplifier.
The M30 requires a standard 48V phantom
power supply. It features a linear free-field
frequency response from 5Hz to 30kHz (please
see the enclosed individual calibration chart),
very low handling noise, uniform polar pattern,
and very high SPL handling capabilities. Its
unique circuitry excludes the transconductance
of the input FET from the overall gain
structure. This means the sensitivity remains
very stable when the microphone is subjected to
variations in ambient temperature. The M30
meets or exceeds ANSI Type 1 requirements.
Each microphone is delivered with its own
calibration chart providing its individually
measured open-circuit sensitivity and the
frequency response curve. A computer file
containing the frequency response data for
importing directly into measurement software is
available from Earthworks, Inc. upon request at
an extra cost. A mounting clip and a calibrator
adapter are included with the microphone.
Applications
Earthworks M30 is ideally suited for
acoustical measurements including loudspeaker
design and quality control, sound system setup
and troubleshooting, room acoustics, or any
application where an accurate free-field
measurement microphone is required. Many test
systems manufacturers, such as EAW Smaart™
and DEQX™, are recommending M30
microphones. The wide linear minimum-phase
response and fast well-damped impulse
response (Fig. 2) make the M30 an excellent
microphone for loudspeaker design, especially
for time domain measurements.
The M30 is simple to operate. Connect the
microphone to a microphone preamplifier
supplying 48V phantom power using a standard
XLR microphone cable. Please allow up to one
minute for the microphone to settle. Plugging in the
microphone “hot” (phantom power already
present at the input) will not damage the
microphone, and is actually preferred for faster
settling. For optimum results we recommend
pointing the M30 toward the sound source.
This microphone has no removable parts.
Calibration
The microphone is calibrated at the factory
at 1 kHz (therefore independent of any
frequency weighting). The sensitivity in mV/Pa
is provided on the calibration chart. If on-site
calibration is required, use the enclosed ½”
adapter.
Specifications
Frequency response: 5Hz to 30kHz +1/-3dB
Polar Pattern: Omnidirectional
Sensitivity: 8mV/Pa (Typical)
Power Requirements: 48V Phantom, 10mA
Peak Acoustic Input: 150dB SPL
Output: XLR (Fig. 1)
Output Impedance: 100 , balanced Ω
(50Ω ea. pin 2 & 3)
Minimum Load: 600Ω btw. pins 2 & 3
Noise: 27dBA equivalent
Dimensions L x D 229 x 22 mm
(9 x .860 in.)
Weight: 225g (.5lb)
Compliant
Specifications are subject to change without
notice.
Fig. 1. XLR Output Connector Assignment of M30
Fig. 2. Impulse Response (Typical) of M30
Fig. 3. Polar Response (Typical) of M30, 1dB/div.

Produktspecifikationer

Varumärke: Earthworks
Kategori: mikrofon
Modell: M30

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