Audio-Technica BP28L Bruksanvisning
Audio-Technica
mikrofon
BP28L
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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 trac, 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.
Produktspecifikationer
| Varumärke: | Audio-Technica |
| Kategori: | mikrofon |
| Modell: | BP28L |
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