Audio-Technica BP4073 User Manual

BP4073
Line + Gradient Condenser Microphone
broadcast & production microphones
An integral 80 Hz high-pass lter provides easy switching from a at frequency response to a low-end roll-off. The roll-off position reduces the pickup of low-frequency ambient noise (such as trafc, air-handling systems, etc.), room reverberation and mechanically coupled vibrations. To engage the high-pass lter, 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 microphone’s sensitivity, thus providing higher SPL capability for exible use with a wide range of users and system congurations. 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.
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.
Features
• Designed for critical long-distance pickup in broadcasting, lm/ TV production and theater sound reinforcement applications
• With an overall length of just 23.3 cm (9.17") and weight of just 99 grams (3.5 oz), the BP4073 adds virtually no heft to the end of a shpole or the top of a minicam
• Innovative acoustic design provides the same directivity as mics up to 50% longer
• Direct-coupled, balanced output ensures a clean signal even in high-output conditions
• Transformerless design for improved pickup of transients
• Rugged housing made of lightweight structural-grade aluminum alloy
• Integral 80 Hz high-pass lter switch and 10 dB pad switch
Description
The BP4073 is an externally polarized (DC bias) condenser microphone with a line + gradient polar pattern. It is designed for use in professional recording, broadcasting, lm/TV/video production, wildlife recording, high­quality sound reinforcement and other demanding applications.
The microphone requires 48V phantom power for operation.
The microphone's highly directional polar pattern provides a narrow acceptance angle along with crisp, intelligible audio reproduction desirable for long-distance sound pickup.
The output of the microphone is a 3-pin XLRM-type connector.
The microphone is equipped with a switchable 10 dB pad and a switch that permits choice of at response or low-frequency roll-off (via integral 80 Hz high-pass lter).
Note: To use the microphone with a camera-mount microphone holder whose diameter is too large to secure the microphone, slide the two supplied o-rings onto the microphone handle, spaced so that one ts just in front of, and the other ts just behind, the rubber nubs inside the microphone holder. When the top of the microphone holder is closed and tightened down, the o-rings should hold the microphone securely in place.
Architect’s and Engineer’s Specications
The microphone shall be an externally polarized (DC bias) condenser. It shall have a line + gradient polar pattern and a frequency response of 20 Hz to 20,000 Hz. The microphone shall operate from an external 48V DC phantom power source. It shall be capable of handling sound input levels up to 141 dB (151 dB with 10 dB pad) with a dynamic range of 128 dB. Nominal open circuit output voltage shall be 35.5 mV at 1 V, 1 Pascal. Output shall be low impedance balanced (50 ohms).
The output of the microphone shall be a 3-pin XLRM-type connector.
The microphone shall be equipped with a switchable 10 dB pad and a switch that permits choice of at response or 80 Hz low-frequency roll-off.
The microphone shall be 233.0 mm (9.17") long and have a diameter of
21.0 mm (0.83"). Weight shall be 99 grams (3.5 oz). The microphone shall be housed in an aluminum alloy housing. The microphone shall include a stand clamp, a windscreen, two o-rings and a protective carrying case.
The Audio-Technica BP4073 is specied.
The microphone is enclosed in a rugged aluminum alloy housing. The included AT8405a stand clamp permits mounting on any microphone stand with 5/8"-27 threads. A windscreen, two o-rings and a protective carrying case are also included.
Operation and Maintenance
The BP4073 requires 48V 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.
Specications
Element
Polar pattern
Frequency response
Low frequency roll-off
Open circuit sensitivity
Impedance
Maximum input sound level
Noise
Dynamic range (typical)
Signal-to-noise ratio1
Phantom power requirements
Switches
Weight
Dimensions
Output connector
Audio-Technica case style
Accessories furnished
In the inter est of standards devel opment, A.T.U.S.
offers full details on its test me thods to other industr y
1 Pascal = 1 0 dynes/cm
1
Typical, A-weighted, using Audio Precision System One.
Specication s are subject to chang e without notice.
professional s on request.
2
= 10 microb ars = 94 dB SPL
BP4073
Externally polarized (DC bias) condenser Line + gradient 20-20,000 Hz 80 Hz, 12 dB/octave –29 dB (35.5 mV) re 1V at 1 Pa 50 ohms 141 dB SPL, 1 kHz at 1% T.H.D.; 151 dB SPL, with 10 dB pad (nominal)
1
13 dB SPL 128 dB, 1 kHz at Max SPL 81 dB, 1 kHz at 1 Pa 48V DC, 4.8 mA typical Flat, roll-off ; 10 dB pad (nominal) 99 g (3.5 oz)
233.0 mm (9.17") long,
21.0 mm (0.83") diameter Integral 3-pin XLRM-type SG2 AT8405a stand clamp for 5/8"-27 threaded stands; 5/8"-27 to 3/8"-16 threaded adapter; AT8144 windscreen; two o-rings; protective carrying case
429
frequency response: 20–20,000 Hz
10 dB
Response in dB
20k
LEGEND
50
200
100
12" or more on axis Roll-off
500
1k
Frequency in Hertz
5k
2k
10k
polar pattern
90˚
LEGEND
200 Hz
1 kHz
210˚
SCALE IS 5 DECIBELS PER DIVISION
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224 Audio-Technica Limited, Old Lane, Leeds LS11 8AG England ©2010 Audio-Technica U.S., Inc. audio-technica.com 0001-0190-01
150˚
180˚
5 kHz 8 kHz
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