Audio Technica ATM250DE Specifications

ATM250DE DUAL-ELEMENT INSTRUMENT MICROPHONE

•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 ATM250DE'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 performers and system configurations.

The ATM250DE includes an AT8471 isolation clamp to provide secure mounting, versatile positioning and effective dampening of unwanted mechanical noise.

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. 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.

ATM250DE SPECIFICATIONS†

ELEMENTS	Condenser, dynamic
POLAR PATTERN	Cardioid (condenser)
	Hypercardioid (dynamic)

FREQUENCY 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-TO-NOISE RATIO1	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/cm2 = 10 microbars = 94 dB SPL

1 Typical, A-weighted, using Audio Precision System One. Specifications are subject to change without notice.

Polar Pattern (Condenser)

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

200 Hz

1 kHz

5 kHz

8 kHz

Frequency Response (Condenser)

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<![endif]>Response in dB

Frequency in Hertz

LEGEND		12" or more on axis
LEGEND		12" or more on axis
		Roll-off

Polar Pattern (Dynamic)

Frequency Response (Dynamic)