Audio-Technica BP28L Manual de Usario

Audio-Technica micrófono 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 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.
BP28L
Audio-Technica Corporation
audio-technica.com
©2022 Audio-Technica 0000-6429-00
Specifications
Fixed-charge back plate, permanently
polarized condenser
Line + gradient
20-20,000 Hz
80 Hz, 18 dB/octave
-10 dB
-23 dB(70.8 mV) (0 dB=1 V/Pa, 1 kHz)
250 ohms
138 dB SPL (1 kHz at 1% THD), 148 dB
SPL (When pad is on.)
3 dB SPL (A-weighted)
135 dB (1 kHz at Max SPL)
91 dB (1 kHz at 1 Pa, A-weighted)
11-52 V DC, 3.4 mA
Low cut: on/o, Pad: on/o
313 g (11 oz)
567.9 mm (22.4") long, 28.0 mm (1.1")
maximum body diameter
Integral 3-pin XLR-M type
SG7
Windscreen (AT8169), holder (AT8470),
stand adapter (⅜"-⅝"), carry case
Element
Polar pattern
Frequency response
Low frequency roll-o
Pad
Open circuit sensitivity
Impedance
Maximum input sound level
Noise1
Dynamic range (typical)
Signal-to-noise ratio1
Phantom power requirements
Switches
Weight
Dimensions
Output connector
Audio-Technica case style
Accessories furnished
In the interest of standards development, A.T.U.S.
oers 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.
Specications are subject to change without notice.
polar pattern
12" or more on axis
LEGEND
Frequency in Hertz
Response in dB
10 dB
100
50 200 10k5k1k500 2k 20k
Roll-off
LEGEND
200 Hz
1 kHz
5 kHz
8 kHzSCALE IS 5 DECIBELS PER DIVISION
240˚
180˚
210˚
270˚
300˚
330˚ 0˚
150˚
120˚
90˚
30˚
60˚
frequency response: 20 –20,000 Hz
To reduce the environmental impact of a multi-language printed document, product information
is available online at www.audio-technica.com in a selection of languages.
An de réduire l’impact sur l’environnement de l’impression de plusieurs langues, les
informations concernant les produits sont disponibles sur le site www.audio-technica.com dans
une large sélection de langue.
Para reducir el impacto al medioambiente, y reducir la producción de documentos en varios
leguajes, información de nuestros productos están disponibles en nuestra página del Internet:
www.audio-technica.com.
Para reduzir o impacto ecológico de um documento impresso de várias linguas, a Audio-Technica
providência as informações dos seus produtos em diversas linguas na www.audio-technica.com.
Per evitare l’impatto ambientale che la stampa di questo documento determinerebbe, le
informazioni sui prodotti sono disponibili online in diverse lingue sul sito www.audio-technica.com.
Der Umwelt zuliebe nden Sie die Produktinformationen in deutscher Sprache und weiteren
Sprachen auf unserer Homepage: www.audio-technica.com.
Om de gevolgen van een gedrukte meertalige handleiding op het milieu te verkleinen, is
productinformatie in verschillende talen “on-line” beschikbaar op: www.audio-technica.com.
www.audio-technica.com
本公司基于减少对环境的影响，将不作多语言文檔的印刷，有关产品信息可在
www.audio-technica.com的官方网页上选择所属语言和浏览。

Especificaciones del producto

Marca: Audio-Technica
Categoría: micrófono
Modelo: BP28L

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