User Manual

• Audio-Technica's proven dual-element design features two
elements (condenser and dynamic) enclosed in a single housing
• Neodymium dynamic element provides punch and attack, while the
condenser element captures the full audio spectrum
• Elements are positioned in a perfect phase relationship, something
practically unachievable with two separate microphones
• Perfect for kick drum, guitar amps and instrument use
• Integral 80 Hz HPF switch and 10 dB pad (condenser element)
• Versatile mounting options and effective dampening of mechanical
noise thanks to included AT8471 isolation clamp
• Corrosion-resistant contacts from gold-plated XLRM-type connector
• Rugged, all-metal design and construction for years of trouble-free
use
The ATM250DE is intended for use in professional applications where
remote power is available. It requires 11V to 52V DC phantom power
only to the condenser output of the supplied cable.
Output from the microphone's 5-pin XLRM-type connector is low
impedance (Lo-Z) balanced. The included 5.0 m (16.5') shielded cable
features a 5-pin XLRF-type input connector and two standard 3-pin
XLRM-type output connectors. The balanced signals appear across
Pins 2 and 3 (condenser) and Pins 4 and 5 (dynamic). Pin 1 is ground
(shield). Output is phased so that positive acoustic pressure produces
positive voltage at Pins 2 and 4.
To avoid phase cancellation and poor sound, all mic cables must be
wired consistently: Pin 1-to-Pin 1, etc.
An integral 80 Hz hi-pass filter on the condenser element provides
easy switching from a flat frequency response to a low-end roll-off. The
roll-off position reduces the pickup of low-frequency ambient noise
(such as traffic, air-handling systems, etc.), room reverberation and
mechanically-coupled vibrations.
The A
TM250DE's condenser element is also equipped with a
switchable 10 dB pad that lowers the microphone's sensitivity, thus
providing higher SPL capability for flexible use with a wide range of
perf
ormers and system configurations.
The ATM250DE includes an AT8471 isolation clamp to provide secure
mounting, versatile positioning and effective dampening of unwanted
mechanical noise
.
A
v
oid lea
ving 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. Take care to keep foreign
particles from entering the windscreen. An accumulation of iron or steel
filings on the diaphragm, and/or foreign material in the windscreen's
mesh surface, can degrade performance.
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
www.audio-technica.com
P51800 ©2006 Audio-Technica U.S., Inc. Printed in China
ATM250DE
ATM250DE SPECIFICATIONS
†
ELEMENTS Condenser, dynamic
POLAR PATTERN Cardioid (condenser)
Hypercardioid (dynamic)
FREQ
UENCY RESPONSE
40-20,000 Hz (condenser)
40-15,000 Hz (dynamic)
LOW FREQUENCY ROLL-OFF 80 Hz, 12 dB/octave (condenser)
OPEN CIRCUIT SENSITIVITY –49 dB (3.5 mV) re 1V at 1 Pa*
(condenser)
–53 dB (2.2 mV) re 1V at 1 Pa*
(dynamic)
IMPEDANCE 50 ohms (condenser)
600 ohms (dynamic)
MAXIMUM INPUT SOUND LEVEL 148 dB SPL, 1 kHz at 1% T.H.D.
(condenser)
DYNAMIC RANGE (typical) 122 dB, 1 kHz at Max SPL
(condenser)
SIGNAL-T
O-NOISE RATIO
1
68 dB
, 1 kHz at 1 Pa* (condenser)
PHANTOM POWER 11-52V DC, 3.5 mA typical
REQUIREMENTS (condenser)
SWITCHES (condenser only) Flat, roll-off; 10 dB pad
WEIGHT 320 g (11.3 oz)
DIMENSIONS 143.6 mm (5.65") long,
55.0 mm (2.17") diameter
OUTPUT CONNECTOR Integral 5-pin XLRM-type
CABLE 5.0 m (16.5') dual shielded,
8-conductor cable, 5-pin
XLRF-type connector at
microphone, two 3-pin XLRM-type
output connectors
ACCESSORIES FURNISHED
AT8471 isolation clamp for
5
/
8
"-27 threaded stands;
5
/
8
"-27 to
3
/
8
"-16 adapter;
soft protective pouch
†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.
Specifications are subject to change without notice.
DUAL-ELEMENT
INSTRUMENT MICROPHONE
8 kHz
Polar Pattern (Condenser)
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
200 Hz
1 kHz
5 kHz
Frequency in Hertz
LEGEND
12" or more on axis
Roll-off
Frequency Response (Condenser)
Response in dB
8 kHz
Polar Pattern (Dynamic)
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
200 Hz
1 kHz
5 kHz
Frequency in Hertz
LEGEND
12" or more on axis
Frequency Response (Dynamic)
Response in dB