The Audio-Technica ATM250DE Dual-Element Instrument Microphone 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 80Hz 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 110deg. F (43deg. 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 case style:||R9|
|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|
|Dimensions (LxDia.):||143.6x55.0 mm / 5.65x2.16"|
|Dynamic Range (Typical):||122 dB, 1 kHz at Max SPL (condenser)|
|Frequency response:||40-20,000 Hz (condenser) 40-15,000 Hz (dynamic)|
|Impedance:||50 ohms (condenser) 600 ohms (dynamic)|
|Low frequency Roll-off:||80 Hz, 12 dB/octave (condenser)|
|Maximum Input Sound Level:||148 dB SPL, 1 kHz at 1% T.H.D. (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)|
|Output connector:||Integral 5-pin XLRM-type|
|Phantom Power Requirements:||11-52V DC, 3.5 mA typical (condenser)|
|Polar pattern:||Cardioid (condenser) Hypercardioid (dynamic)|
|Signal to Noise Ratio:||68 dB, 1 kHz at 1 Pa (condenser)|
|Switches:||Flat, roll-off; 10 dB pad (condenser only)|
|Weight:||320g / 11.28oz|