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Part# - AT851-SP - Audio Technica - AT851-SP - Unidirectional (Cardioid) Condenser Boundary Microphone - Mono or Stereo versions available

Retail: ~~$279.00~~ Your Price (USD): $169.00 You Save: 39.43%

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Description:

Mono or Stereo Cardioid (Uni-Directional) Boundary Microphone

This is the same microphone used in this Audio Technica Product, except that it is wired with a miniplug for use with recorders having a 1/8" (3.5mm) microphone input providing 1.5 to 9 volts "plug-in power", commonly available on many portable recorders (most MiniDisc and DAT recorders). For recorders without plug-in power, a optional battery module is available above to power this mic. Other models are available here. If you are plugging this mic into a device that has 9-52 volt phantom power (many mixers and professional equipment), select the phantom power option above and a mini locking XLR plug is substituted for the standard 1/8" mini plug and this plugs into the Samson phantom power adapter (included with this option).

For stereo use (great for recording at long conference tables, too!), choose the stereo version in the option box, and the two microphones will be wired together into a single stereo miniplug as noted above.

Mono version also available wired for "Dual mono" so that the mono signal appears on both channels of a stereo recorder. NOTE: Dual Mono version will not work with true mono recorders (like dictation recorders, etc). It is only for use with stereo recorders where you want the sound to be recorded on both channels. This note does not apply to versions with the phantom power option.

Offering outstanding Audio-Technica sound for surface-mount applications, the U851A features a PivotPoint� rotating output connector, UniSteep� filter and UniGuard� RFI-shielding technology. This condenser microphone accepts interchangeable condenser elements�available for boundary microphones in cardioid, hypercardioid and omnidirectional polar patterns. Its heavy die-cast case and silicon foam bottom pads minimize coupling of surface vibration to the microphone. With superior off-axis rejection and maximum gain-before-feedback, this professional microphone sets audio-quality standards in challenging acoustic environments.

Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations

PivotPoint� rotating output connector allows cable to exit from either the rear or the bottom of the microphone

Superior off-axis rejection for maximum gain before feedback

UniGuard� RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)

UniSteep� filter provides a steep low-frequency attenuation to improve sound pickup without affecting voice quality

Small-diameter UniPoint capsule near boundary eliminates phase distortion and delivers clear, high-output performance

Heavy die-cast case and non-slip silicon foam bottom pads minimize coupling of surface vibration to the microphone

Low-profile design with low-reflectance black finish for minimum visibility

SPECIFICATIONS

ELEMENT Fixed-charge back plate, permanently polarized condenser

POLAR PATTERN Half-cardioid
(cardioid in hemisphere above mounting surface)

FREQUENCY RESPONSE 30-20,000 Hz

LOW FREQUENCY ROLL-OFF 80 Hz, 18 dB/octave

OPEN CIRCUIT SENSITIVITY �41 dB (8.9 mV) re 1V at 1 Pa

IMPEDANCE 270 ohms

MAXIMUM INPUT SOUND LEVEL 123 dB SPL, 1 kHz at 1% T.H.D.

DYNAMIC RANGE (typical) 101 dB, 1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO 72 dB, 1 kHz at 1 Pa

POWER REQUIREMENTS 2-12 VDC, 2 mA typical, "plug-in-power"

BATTERY CURRENT / LIFE 0.4 mA / 1200 hours typical (alkaline)

SWITCH Off, on-flat, on-roll-off

WEIGHT (MICROPHONE) 8.6 oz (244 g)

WEIGHT (POWER MODULE) 4.9 oz (139 g)

DIMENSIONS (MICROPHONE) 4.25" (108.0 mm) long,
3.31" (84.0 mm) maximum width,
0.91" (23.0 mm) height

CABLE 25.0' (7.6 m) long (permanently attached to microphone), 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with miniplug connector

OPTIONAL INTERCHANGEABLE ELEMENTS UE-H hypercardioid (100�);
UE-O omnidirectional (360�)

SPECIFICATION GRAPHS

Click on the chart to view the larger image

POLAR PATTERN

FREQUENCY RESPONSE

The Sound Professionals™, Inc.
3444 Sylon Blvd.
Hainesport, NJ 08036 USA

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