Audio-Technica BP4071 Line Plus Gradient Condenser Microphone

At under 16 inches, the AT BP4071 interference tube microphone provides directionality and off-axis rejection found in shotgun mics up to 50% longer.

With directivity equal to mics up to 50% longer, the Audio-Technica BP4071 has been specially created to meet the pickup demands of broadcasting, film/TV sound, professional recording, wildlife recording and theater sound reinforcement. Particularly useful for miking dynamic action in film/TV audio as well as in "spot" miking techniques in the music studio or theater, the 15.55"-long BP4071 provides a low noise floor and direct-coupled, balanced output for a clean signal even in high-output conditions. Audio-Technica has pioneered an interference tube design in the BP4071 that provides the same directivity as mics up to 50 percent longer.


- Designed for use in broadcasting, film/TV production, and theater sound reinforcement applications
- Direct-coupled, balanced output ensures a clean signal even in high-output conditions
- Innovative acoustic design provides same directivity as mics up to 50% longer
- Rugged housing made of lightweight structural-grade aluminum alloy
- Transformerless design for improved pickup of transients
- Switchable 80 Hz high-pass filter & 10 dB pad
- RoHS-compliant - free from all substances specified in the EU directive on the reduction of hazardous substances (RoHS)

Element: Externally Polarized (Dc Bias) Capacitor

Polar Pattern: Line + Gradient

Frequency Response: 20-20,000 Hz

Low Frequency Roll-Off: 80 Hz, 12 Db/Octave

Open Circuit Sensitivity: -29 Db (35.5 Mv) Re 1v At 1 Pa

Impedance: 50 Ohms

Maximum Input Sound Level: 141 Db Spl, 1 Khz At 1% T.H.D.;

151 Db Spl, With 10 Db Pad (Nominal)

Noise: 13 Db Spl

Dynamic Range (Typical): 128 Db, 1 Khz At Max Spl

Signal-To-Noise Ratio: 81 Db, 1 Khz At 1 Pa

Phantom Power Requirements: 48v Dc, 4.8 Ma Typical

Switches: Flat, Roll-Off; 10 Db Pad (Nominal)

Weight: 136 G (4.8 Oz)

Dimensions: 395.0 Mm (15.55") Long, 21.0 Mm (0.83") Maximum Body Diameter

Output Connector: Integral 3-Pin Xlrm-Type

Accessories Furnished: At8405a Stand Clamp For 5/8"-27 Threaded Stands; 5/8"-27 To 3/8"-16 Threaded Adapter; At8145 Windscreen; Two O-Rings; Protective Carrying Case
Audio-Technica Case Style: Sg3
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 1.75 lbs
Shipping Dimensions: 20 x 5 x 3 in
Manufacturer Part Number (MPN): BP4071

For support or warranty questions, please contact the manufacturer:
Phone: 330-686-2600 x5000


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