U857A - Microphone Audio-Technica - Free user manual and instructions
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| Product Type | Condenser Boundary Microphone |
| Brand | Audio-Technica |
| Model | U857A |
| Polar Pattern | Cardioid |
| Frequency Response | 30 – 20,000 Hz |
| Open Circuit Sensitivity | -40 dB (10 mV) re 1V at 1 Pa |
| Impedance | 100 ohms |
| Phantom Power Requirement | 9 – 52V DC, 2 mA typical |
| Cable Length | 3 m (9.8 ft) permanently attached |
| Weight | 80 g (2.8 oz) |
| Dimensions | 108.0 mm (length) × 23.0 mm (diameter) |
| Color | Black |
| Connector | XLRM (3-pin male) |
| Included Accessories | Windscreen, mounting screws |
| Cleaning Instructions | Wipe with a dry, soft cloth. Avoid solvents. |
| Safety | Phantom power must be off when connecting/disconnecting. |
| Spare Parts & Repairability | Contact Audio-Technica service center for replacement parts. |
Frequently Asked Questions - U857A Audio-Technica
Does the Audio-Technica U857A require phantom power?
Yes, the U857A is a condenser microphone and requires phantom power (9–52V DC).
What is the polar pattern of the U857A?
It has a cardioid polar pattern, which picks up sound from the front and rejects from the rear.
How do I clean the U857A microphone?
Wipe the exterior with a dry, soft cloth. Do not use solvents or immerse in water.
What is the frequency response of the U857A?
The frequency response is 30–20,000 Hz, suitable for speech and music.
Can I use the U857A with a standard XLR microphone input?
Yes, it has a 3-pin XLRM connector and works with any mixer/interface that provides phantom power.
How should I place the U857A on a surface?
Place it on a flat, stable surface with the grille facing the sound source. Use the included mounting screws if needed.
Does the microphone come with a windscreen?
Yes, a windscreen is included to reduce plosives and wind noise.
What is the cable length of the U857A?
The permanently attached cable is 3 m (9.8 ft) long.
The microphone has no output. What should I check?
Ensure phantom power is activated, the cable is securely connected, and the mixer channel is not muted.
Where can I find spare parts or repair service?
Contact Audio-Technica customer support or an authorized service center for parts and repairs.
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USER MANUAL U857A Audio-Technica
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Product information
Brand : Audio-Technica
Model : U857A
Category : Microphone