Data Sheet

SPECIFICATIONS:
ARCHITECTS AND ENGINEERS SPECIFICATIONS:
The microphone shall be of the condenser type with a modular threaded capsule available in cardioid,
hypercardioid, omni-directional and supercardioid polar patterns. The microphone shall be protected
from RF interference. The microphone shall have a fully integrated preamp circuitry thereby eliminating
the need for a remote preamplier module. The microphone shall operate on 18 - 52 Volts DC and the
nominal output impedance shall be equal to 150 ohms at 1 kHz. The microphone shall have a sensitivity
of 10 mV / Pa at 1 kHz with the cardioid capsule. The microphone shall have a maximum SPL level of
≥140 dB with THD of 0.5% and the microphone shall be machined out of brass and the dimensions shall
be 12 mm in diameter by 54 mm in length. The microphone shall be the Audix M1250B.
OPERATION:
The M1250B is a low impedance microphone and should be plugged into a “mic level” input on your
console, mixer or recording device. The M1250B requires phantom power and will NOT operate without
phantom power voltage (48 Volts recommended) which is available on most professional mic preamps
and mixing devices. If phantom power is not available on your equipment, you will have to procure a
phantom power supply (such as the Audix APS2).
Avoid plugging or unplugging the microphone from a PA system unless the channel is muted or the
volume of the system turned down. Failure to do so may result in a loud “popping” noise which could
seriously damage the speakers in the PA system.
USER TIPS:
The M1250B, despite its size, has all the attributes of a world class recording microphone. Low noise
integrated electronics allows the microphone to function in the close eld as well as in distance miking.
It can be used on a wide variety of acoustics instruments as well as on voice and vocal ensembles.
Polar patterns: The M1250B is oered in 4 dierent polar patterns to help you achieve optimum results.
Cardioid (M1250B): In general, the cardioid pattern is the most widely used as it oers a good balance
between the sound of the instrument or voice within the context of the room or venue. The cardioid
pattern is also helpful with resistance to feedback. For acoustic instruments, in general, the working
range will depend on the sound pressure levels produced by the instrument. Because of its small
size, the M1250B can also be used in hard to reach areas, such as beneath a cymbal. For orchestral
instruments, the M1250B may be positioned anywhere from 3 - 12 inches depending on instrument and
room acoustics. For speech or singe voice the typical working distance is 8 - 10 inches. For area miking
or group vocals the working distance can be between 2 - 3 feet from the sound source (see ADX40 and
MB1250B for choir miking).
Hypercardioid (M1250B-HC): In situations where the volume is loud on stage or there are many open
microphones, this pattern is helpful in further isolating the instrument or vocal from the rest of the
instruments on stage. The microphone can be worked at ½ the distance of cardioid if necessary
Supercardioid (M1250B-S): This polar pattern, also known as a shotgun pick up pattern, has a longer
reach and more narrow pattern than the other cardioid patterns. This pattern is a preference at time for
podium applications. It is helpful in pin-pointing hard to reach areas, especially for recording outdoors,
and with video.
Omni-Directional (M1250B-O): This pattern picks up from all directions, oering very little in the
way of isolation or feedback control. However, the omni pattern oers the most accurate and natural
sound reproduction of all the patterns. It is ideal for recording, live broadcasts or video where sound
reinforcement speakers are not an issue.
*Further miking techniques may be found on our website at www.audixusa.com
Transducer Type Condenser
Frequency Response 50 Hz - 19 kHz
Polar Pattern Cardioid
Hypercardioid
Omni
Supercardioid
Output Impedance 150 ohms
Sensitivity 10 mV / Pa (C) @ 1k
10 mV / Pa (HC) @ 1k
11 mV / Pa (O) @ 1k
Signal/Noise Ratio (A-weighted) 73 dB
Equivalent Noise Level (A-weighted) 21 dB
Maximum SPL @ .5% THD ≥140 dB
Dynamic Range 119 dB
Power Requirements 18 – 52 V
Connector 3 pin mini-XLRm
Polarity Positive pressure on
diaphragm produces
positive voltage on pin
2 relative to pin 3
Housing / Finish Machined brass /
Powder coat
Weight 0.55 oz / 15.6 grams
Length 2.1 inches / 54 mm
FREQUENCY / POLARS:
DIMENSIONS (mm):
M1250B
Cardioid Hypercardioid Omni
SERVICE AND WARRANTY:
This microphone is under warranty for a period of 3 years from
any and all manufacturing defects. Should your microphone
fail in any way, please contact the Audix Service department
at 503-682-6933. A Return Authorization number is required
before returning any products.
CARE AND MAINTENANCE:
The M1250B is manufactured to exacting specs with roadworthy
construction. However, the capsule is highly sensitive and should be handled
with care. Avoid extreme temperatures and be sure to store your microphone
in the pouch provided when not in use. Moisture of any kind can adversely
aect the sound and performance of your microphone.
***All specications subject to change without notice.
www.audixusa.com
503-682-6933 Fax: [phone]
Audix Corporation 9400 SW Barber St. Wilsonville, OR 97070
AUD IX WARRANTY REGISTRAT ION F ORM
Please Check all that apply:
Male Female
Age: Occupation: Primary Instruments: Product to be used for:
18 or Under Musician Vocal Pro live sound
19-25 Producer Guitar / Bass Pro recording
26-35 Sound Eng. Drums Home recording
36-45 Radio/TV Keyboard Rehearsal
46-55 Production Brass Installation
55 + Other _______ Woodwinds School
Strings House of Worship
How did you hear about Audix? Other ___________ Other ___________
Magazine Ad Online Ad
On-line Store Friend Do you own other Audix Products? Yes No
Salesman Other __________ Model(s) ________________________________
Have you visited the Audix website? Yes No
Please register your product online at www.audixusa.com or mail this form to:
Audix Microphones P.O. Box 4010 Wilsonville, OR 97070
Name:________________________________ Model:___________________
Company:_____________________________ Serial Number:_____________
Address:______________________________ Store:____________________
City:_________________________________ Store Location:_____________
Prov./State:___________ Zip:_____________ Purchase Date:_____________
Phone: ( )___________________________ Signature:_________________
Email:________________________________ Date:____________________
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