BETA 181/BI - Microphone SHURE - Free user manual and instructions
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| Product Type | Condenser Microphone with Interchangeable Capsule |
| Polar Pattern | Bidirectional (Figure-8) |
| Frequency Response | 20 Hz - 20 kHz |
| Impedance | 110 Ω (rated) |
| Sensitivity (at 1 kHz, open circuit voltage) | -33 dBV/Pa (22 mV/Pa) |
| Maximum SPL (1% THD) | 146 dB SPL (at 1 kHz) |
| Phantom Power Requirement | 11-52 V DC (IEC 61938) |
| Connector | 3-Pin Professional Audio (XLR), Male |
| Dimensions (Length x Diameter) | 60.5 mm (2.38 in) x 19.1 mm (0.75 in) |
| Weight (without cable and capsule) | 140 g (5 oz) |
| Included Capsule | Interchangeable Bidirectional Capsule |
| Other Interchangeable Capsules | Cardioid, Supercardioid, Omnidirectional (sold separately) |
| Finishing | Black Metallic Finish |
| Maintenance & Cleaning | Clean with a soft, dry cloth. Avoid liquids and solvents. Protect grille from dust and moisture. |
| Safety Precautions | Use only with phantom power supplies. Do not disassemble. Keep away from extreme temperatures and humidity. |
| Spare Parts & Reparability | Capsules, windscreens, and cable connectors are replaceable. Contact Shure for servicing. |
| General Information | Ideal for critical sound reinforcement and recording. Switchable pre-attenuation pad and low-cut filter on some models. |
Frequently Asked Questions - BETA 181/BI SHURE
What is the polar pattern of the Shure BETA 181/BI?
The BETA 181/BI has a bidirectional (figure-8) polar pattern, picking up sound from the front and back while rejecting sides.
Does the BETA 181/BI require phantom power?
Yes, it is a condenser microphone and requires 11-52 V DC phantom power from a mixer or audio interface.
Can I change the capsule on the BETA 181/BI?
Yes, the BETA 181 series features interchangeable capsules. The BI model comes with a bidirectional capsule, but you can swap it with cardioid (R), supercardioid (S), or omnidirectional (O) capsules.
What is the frequency response of this microphone?
The frequency response is 20 Hz to 20 kHz, with a slight presence boost for clarity.
How do I connect the BETA 181/BI to my equipment?
Use a standard XLR cable to connect the microphone to a mixer or interface that provides phantom power.
Is the BETA 181/BI suitable for recording vocals?
While primarily designed for instrument miking (piano, overheads, acoustic guitar), its bidirectional pattern can be used for vocals in specific scenarios like duet recording.
How do I clean and maintain the microphone?
Gently wipe the exterior with a soft, dry cloth. Do not use liquids or solvents. Protect the grille from dust and moisture.
What is the maximum SPL the BETA 181/BI can handle?
It can handle up to 146 dB SPL (at 1 kHz, 1% THD) without distortion, making it suitable for loud sources like guitar amps.
Does the microphone have a low-cut filter or pad?
Some BETA 181 models include a switchable low-cut filter and pre-attenuation pad. Check your specific unit; if present, adjust via the switches on the body.
Where can I find spare parts or get repairs?
Contact Shure customer support or authorized dealers for replacement capsules, windscreens, or other parts. Repairs should be handled by qualified technicians.
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