Shure SM91A User Guide

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Shure SM91A Microphone Specification

The Shure SM91A is a boundary condenser microphone specifically designed for professional sound reinforcement and studio recording applications. It features a half-cardioid polar pattern, optimized for capturing clear and detailed audio across a wide frequency range, from 20 Hz to 20 kHz. The microphone's low-profile design makes it unobtrusive and ideal for use in a variety of settings, such as stage floors or conference tables. Equipped with a wide dynamic range and high SPL handling, the SM91A is adept at capturing both subtle nuances and powerful sound sources, making it suitable for applications ranging from vocal and instrumental recordings to theatrical performances. It includes an integrated preamp that ensures a high output level and is powered via phantom power, providing ease of integration with professional audio equipment. The microphone's durable construction and robust design offer reliability and longevity, even in demanding environments. The SM91A also incorporates a built-in cable with a dual XLR connector for easy connectivity, enhancing its utility in diverse audio setups. Its engineering excellence ensures minimal distortion and noise, delivering pristine audio quality for critical listening environments. Whether used in live sound reinforcement, broadcasting, or studio recording, the Shure SM91A stands out as a versatile and reliable choice for capturing high-fidelity audio.

Shure SM91A Microphone F.A.Q.

How do I position the Shure SM91A for optimal sound capture in a live setting?

Position the SM91A on a flat surface such as a stage floor or podium. Aim it towards the sound source, ensuring it's not obstructed. The boundary layer design helps minimize phase cancellation, making it ideal for capturing a clear, natural sound.

What are the best practices for cleaning and maintaining the Shure SM91A microphone?

Use a soft, dry cloth to gently wipe the microphone surface. Avoid using alcohol-based cleaners or submerging it in water. Regularly inspect the cable and connectors for any signs of wear or damage.

Can I use the Shure SM91A with a wireless system?

Yes, the SM91A can be used with a wireless system by connecting it to a wireless bodypack transmitter. Ensure the transmitter is compatible with the microphone's impedance and output level.

What should I do if the SM91A is picking up too much ambient noise?

Try repositioning the microphone closer to the sound source to reduce ambient noise pickup. Additionally, use noise gates or low-cut filters in your audio processing chain to minimize unwanted noise.

How do I troubleshoot connectivity issues with the Shure SM91A?

Check all cable connections for tightness and ensure there are no visible damages. Test the microphone with a different cable and input device to isolate the issue. If problems persist, consider consulting Shure customer support.

What type of power does the Shure SM91A require?

The SM91A requires phantom power, typically provided by most mixers or audio interfaces. Ensure that phantom power (usually 48V) is enabled on the channel to which the microphone is connected.

Is the Shure SM91A suitable for outdoor use?

While the SM91A can be used outdoors, it's important to protect it from moisture and extreme temperatures. Using a windscreen and ensuring it remains dry will help maintain audio quality and prolong its lifespan.

How can I reduce feedback when using the SM91A on stage?

Position the microphone away from monitors and speakers. Use a graphic equalizer to identify and cut frequencies that are prone to feedback. Additionally, consider using directional microphones for other sound sources on stage.

What is the ideal application for the Shure SM91A microphone?

The SM91A is ideal for capturing pianos, kick drums, and other instruments that benefit from boundary layer effects. Its design minimizes phase issues, making it suitable for close-miking applications on flat surfaces.

How do I handle signal distortion issues with the SM91A?

Check the input gain on your mixing console or audio interface to ensure it's not too high. Use a pad switch if available, and make sure phantom power is correctly supplied. Adjust the microphone positioning as needed to avoid distortion from high SPL sources.