Audio Technica AT4049a Specifications
AT4049a
OMNIDIRECTIONAL
CAPACITOR MICROPHONE
Description
The AT4049a is a transformerless externally-polarized capacitor
studio microphone. It has been specially engineered to meet the
most critical acoustic requirements of professional recording and
broadcast.
The AT4049a features a smooth, flat frequency response over
its extended 20-20,000 Hz range. The omnidirectional head capsule
may be easily removed, stored and replaced with an optional
cardioid or hypercardioid capsule to meet the needs of the widest
range of miking applications.
The balanced output is direct-coupled, resulting in a clean
signal even under high-output conditions. The microphone is totally
free of the distortion associated with conventional transformer-coupled
outputs. Its fast response to transients contributes to the open,
transparent reproduction of even the most troublesome of instruments and sound effects.
The AT4049a combines the benefits of exceptionally low selfnoise with very high output. Equally important, it handles very high
sound pressure levels with ease—up to 146 dB SPL while producing
no greater than 1% T.H.D. The AT4049a may be used with confidence
in a wide variety of miking applications, even under the stringent
demands of modern digital recording systems.
An integral 80 Hz hi-pass filter provides easy switching from a
flat frequency response to a low-end roll-off. The hi-pass switch is
recessed to prevent accidental activation. The hi-pass position
reduces the microphone’s sensitivity to “popping” in close vocal use
and to handling noise. It also attenuates unwanted low-frequency
ambient noise (from traffic, air-handling systems, etc.) and room
reverberation. Use of the supplied foam windscreen helps reduce
wind and “popping” noise.
A rugged microphone, the AT4049a housing is constructed of
turned brass, rather than thin-wall aluminum. Its surface is plated in
black chrome for durability and low reflectivity.
The AT4049a will operate in conjunction with any remote “phantom”
or “simplex” power source supplying 48 volts DC. The phantom
voltage not only powers the microphone’ s impedance con v erter, b ut
is stepped-up to a higher voltage internally to polarize the capacitor
element.
Modular Expansion Capability
The AT4049a consists of two modular subassemblies which
are threaded together: the AT4900a-48 handle containing the microphone’s electronics, and the AT4049a-EL capacitor head capsule.
The versatility of the AT4049a may be increased through
the addition of optional accessory head capsules. The AT4051a-EL
capsule provides the advantages of a smooth, wide-response
cardioid pattern. The AT 4053a-EL hypercardioid element offers
excellent side rejection for increased working distance, and a highly
uniform polar pattern that virtually eliminates off-axis coloration.
A compartmentalized protective carrying case accommodates
the microphone, stand adapter, windscreen and two optional head
capsules.
Architects and Engineers Specifications
The microphone shall have a frequency response of
20 Hz to 20,000 Hz. Its capacitor element shall be of a DC bias
design and shall obtain its polarizing voltage and impedanceconverter power from an external 48V DC (±4V) phantom power
source. The microphone shall have an omnidirectional polar pattern.
The element shall be interchangeable with optional capsules offering cardioid or hypercardioid polar patterns.
Nominal open-circuit output voltage shall be 22.4 mV at 1 kHz,
1 Pascal. The microphone shall have an output impedance of 100
ohms and output shall be transformerless balanced. The microphone shall accept a 146 dB SPL at 1 kHz while producing no
greater than 1% T.H.D.
The microphone shall have a length of 6.10" (155.0 mm), a
diameter of 0.83" (21.0 mm), and a weight of 4.2 oz (120 g). The
microphone housing shall be turned brass with a low-reflectance
black chrome finish.
The Audio-Technica AT4049a is specified.
40 SERIES PRECISION MICROPHONES
AT4049a
500
1k
Frequency in Hertz
†
2
19 dB SPL
0.83" (21.0 mm) body diameter
stands; protective carrying case; reticulated,
open-cell foam windscreen
†In the interest of standards development, A.T.U.S. offers
full details on its test methods to other industry professionals
on request.
* 1 Pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL
1
Measured at diaphragm
2
Using Audio Precision System One
10 dB
Response in dB
2k
10k
5k
20k
Specifications
ELEMENT Externally polarized (DC bias) capacitor
POLAR PATTERN Omnidirectional
FREQUENCY RESPONSE 20-20,000 Hz
OPEN CIRCUIT SENSITIVITY (1 kHz) – 3 3 dB (22.4 mV) ± 2 dB, re 1V at 1 Pa*
IMPEDANCE 100 ohms
MAXIMUM INPUT SOUND LEVEL 146 dB SPL, 1 kHz at 1% T.H.D.
NOISE, TYPICAL (A-WEIGHTED)
DYNAMIC RANGE, TYPICAL 127 dB, 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO, TYPICAL 75 dB, 1 kHz at 1 Pa*
HI-PASS FILTER (LOW-END ROLL- OFF) 80 Hz, 12 dB/octave
POWER REQUIREMENTS 48V DC phantom (±4V)
CURRENT CONSUMPTION, TYPICAL 3.2 mA
WEIGHT (LESS CABLE AND CLAMP) 4.2 oz (120 g)
DIMENSIONS 6.10" (155.0 mm) long,
ACCESSORIES FURNISHED AT8405 snap-in clamp for 5/8"-27 threaded
Frequency Response
50
200100
LEGEND
12" or more on axis (flat)
Roll-off
Optional Accessories:
• AT4051a-EL cardioid microphone
capsule.
• AT4053a-EL hypercardioid microphone
1
capsule.
• AT 8106 metal-frame pop filter.
• AT8114 foam windscreen for AT8106
pop filter.
• AT8314 2-conductor, shielded, vinyljacketed, broadcast-type cable with
XLRF-type connector at microphone
end, XLRM-type connector at equipment
end. Available in 10', 20', 25', 30', 50'
& 100' lengths.
• AT8 407 universal “clothes-pin” stand
clamp fits both tapered and cylindrical
microphones.
AT8410a shock mount for boom or stand
•
operation. Universal “clothes-pin” clamp
fits tapered and cylindrical microphones.
• AT8415 shock mount for boom or stand
operation.
• CP8506 four-channel 48V phantom power
supply (AC powered).
• AT8801 single-channel 48V phantom
power supply (AC powered).
Audio-Technica microphones and accessories purchased
in the U.S.A. are warranted for one year from date of
purchase by Audio-Technica U.S., Inc. (A.T.U.S.) to be
free of defects in materials and workmanship. In event of
such defect, product will be repaired promptly without
charge or, at our option, replaced with a new product of
equal or superior value if delivered to A.T.U.S. or an
Authorized Service Center, prepaid, together with the
sales slip or other proof of purchase date.
from A.T.U.S. is required for return.
excludes defects due to normal wear, abuse, shipping
damage, or failure to use product in accordance with
instructions. This warranty is void in the event of unauthorized repair or modification, or removal or defacing
of the product labeling.
For return approval and shipping information,
the Service Department, Audio -Technica U.S., Inc., 1221
Commerce Drive, Stow, Ohio 44224.
Except to the extent precluded by applicable state law,
A.T.U.S. will have no liability for any consequential,
incidental, or special damages; any warranty of
merchantability or fitness for particular purpose
expires when this warranty expires.
This warranty gives you specific legal rights, and you may
have other rights which vary from state to state.
Outside the U.S.A., please contact your local dealer for
warranty details.
One-Year Limited Warranty
Prior approval
This warranty
contact
Polar Pattern
0
330
300
270
240
210
180
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
SCALE IS 5 DECIBELS PER DIVISION
same as 1 kHz
Audio -Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio -Technica Limited, Old Lane, Leeds LS11 8AG England
Form No. 0345- 0816-0 0-B/ W 1997 Audio-Technica U.S., Inc. Printed in U.S.A.
30
60
90
120
150
0.75"
19.0 mm
Dimensions
6.10"
155.0 mm
0.83"
21.0 mm
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