Audio-Technica BP28L Handleiding

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BP28L Line + Gradient Large Diaphragm

Condenser Microphone

Broadcast & Production

Features

• Ideal for film/TV production and broadcasting applications

• Large-diaphragm condenser element and optimized circuitry deliver

exceptional low-noise performance

• Overall length of 22.4" (567.9 mm) with an extremely narrow, highly

directional pickup pattern

• Transformer-coupled output provides smooth sonic character, and maintains a

constant load output impedance for a stable relationship between the mic and

mic preamp

• Extremely high sensitivity (-23 dBv), wide dynamic range (135 dB), and high-

SPL capability (138 dB)

• Flat frequency response for accurate sound reproduction

• Rugged housing made of lightweight, structural-grade aluminum alloy

• Switchable 80 Hz high-pass filter and -10 dB pad

Description

The BP28L combines a large-diaphragm condenser element with a 28 mm diameter

shotgun body for exceptional low-noise performance.

With an extremely tight pickup pattern and a patented acoustic port design that

maintains directionality across the entire frequency range, this 22.4" shotgun

microphone is specially tailored to meet the needs of broadcast, film, television,

outdoors recording and theater applications. Particularly suitable for long-distance

miking for film or theater, the BP28L has an exceptionally low noise floor (3 dB) and

transformer-coupled outputs that produce a smooth sonic character. The microphone

also provides extremely high sensitivity (-23 dBV), wide dynamic range (135 dB), and

high-SPL capability (138 dB), and is equipped with a switchable 80 Hz high-pass filter

and 10 dB pad.

Operation and Maintenance

The BP28 requires 11V to 52V 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 80 Hz high-pass filter provides easy switching from a flat frequency

response to a low-end roll-o. The roll-o position reduces the pickup of low-

frequency ambient noise (such as trac, air-handling systems, etc.), room

reverberation and mechanically coupled vibrations. To engage the high-pass filter,

use the end tip of a paperclip or other small pointed instrument to slide the switch

toward the “bent” line.

The microphone is also equipped with a switchable 10 dB pad that lowers the

474.2 mm (18.7")

567.9 mm (22.4")

93.7 mm (3.7")

φ28.0 mm (1.1")

microphone’s sensitivity, thus providing higher SPL capability for flexible use with a

wide range of users and system configurations. To engage the 10 dB pad, use the

end tip of a paperclip or other small pointed instrument to slide the switch toward

the -10 position.

Note: The power module and interference tube are detachable. Make certain this

connection is hand-tight before use.

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.

Product specificaties