User Manual

20 series microphones
AT2031
Cardioid Condenser End-Address Microphone
The ideal microphone for stringed instruments
Features
• Outstanding performance and rugged construction
• High SPL handling and wide dynamic range
• Smooth, extended frequency response with a slight rise in the
high-frequency region
• Switchable 150 Hz 6dB/oct hi-pass lter
• Cardioid polar pattern improves isolation of desired sound source
• Low self noise perfectly suited for digital recording equipment
• Ideal for stringed instruments such as Violin, Cello, Acoustic
Guitar, Harp and Piano.
Description
The AT2031 is the ideal microphone for stringed instruments in critical
studio and live applications. Its permanently polarized element offers
extended frequency response with a slight rise in the high frequency
range for a more detailed sound. Its low self-noise and high SPL handling
capability offer a wide dynamic range, perfectly suited for the most
demanding applications.
Operation and Maintenance
The AT2031 requires 48V phantom power for operation.
Output is low impedance (Lo-Z) balanced. The signal appears across Pins
2 and 3; Pin 1 is ground (shield). Output phase is “Pin 2 hot”—positive
acoustic pressure produces positive voltage at Pin 2.
To avoid phase cancellation and poor sound, all mic cables must be wired
consistently: Pin 1-to-Pin 1, etc.
An integral 150 Hz high-pass lter provides easy switching from a at
frequency response to a low-end roll-off. The roll-off position reduces
the pickup of low-frequency ambient noise (such as trafc, air-handling
systems, etc.), room reverberation and mechanically coupled vibrations.
To engage the high-pass lter, slide the switch toward the “bent” line.
Avoid leaving the microphone in the open sun or in areas where
temperatures exceed 110° F (43° C) for extended periods. Extremely high
humidity should also be avoided.
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
©2011 Audio-Technica U.S., Inc. audio-technica.com
12" or more on axis
Roll-o
LEGEND
Frequency in Hertz
Response in dB
10 dB
100
50
200
10k
5k
1k
500
2k
20k
LEGEND
200 Hz
1 kHz
8 kHz
SCALE IS 5 DECIBELS PER DIVISION
240˚
180˚
210˚
270˚
300˚
330˚
0˚
150˚
120˚
90˚
30˚
60˚
frequency response:
polar pattern
Fixed-charge back plate,
permanently polarized condenser
Cardioid
20-20,000 Hz
150 Hz, 6 dB/octave
-34 dB (19.9 mV) re 1V at 1 Pa
85 ohms
141 dB SPL, 1 kHz at 1% T.H.D.;
17 dB SPL
124 dB, 1 kHz at Max SPL
77 dB, 1 kHz at 1 Pa
48V DC, 2.0 mA typical
Flat, roll-off
134 g
143.0 mm long, 21.0 mm maximum body Ø
Integral 3-pin XLRM-type
AT8405a stand clamp; windscreen;
soft protective pouch
Element
Polar Pattern
Frequency Response
Low Frequency Roll-Off
Open Circuit Sensitivity
Impedance
Maximum Input Sound Level
Noise
Dynamic Range (Typical)
Signal-To-Noise Ratio
Phantom Power Requirements
Switches
Weight
Dimensions
Output Connector
Accessories Furnished
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/cm
2
= 10 microbars = 94 dB SPL
1
Typical, A-weighted, using Audio Precision System One.
Specications are subject to change without notice.
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