Shure SM91 User Guide

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Shure SM91 Microphone Specification

The Shure SM91 is a professional boundary microphone engineered for superior sound capture, particularly in acoustic environments requiring high-quality audio reproduction. It features a half-cardioid polar pattern that optimizes sound pick-up directly in front of the microphone, minimizing noise from the sides and rear. This design makes it ideal for stage performances, choirs, and other live sound applications where feedback rejection is crucial. The microphone is equipped with a condenser cartridge, offering a broad frequency response ranging from 20 Hz to 20 kHz. This ensures clear and accurate sound reproduction across the audio spectrum. The SM91 is designed to be placed on flat surfaces, with its boundary layer construction enhancing the direct-to-reflected sound ratio, improving sound clarity and presence.

The microphone operates on phantom power, requiring 12 to 48 V DC, which is standard in professional audio setups. It includes an in-line preamplifier, allowing for seamless integration with various audio systems. Its robust construction features a steel grille and a durable polymer casing, ensuring longevity and resilience in demanding environments. The SM91's low-profile design allows for discreet placement, making it suitable for theatrical productions and broadcast applications where visibility is a concern. Additionally, the microphone's output is balanced, reducing interference and ensuring clean audio transmission over long cable runs. Overall, the Shure SM91 is a versatile and reliable microphone, offering exceptional performance for professional audio applications.

Shure SM91 Microphone F.A.Q.

How do I properly position the Shure SM91 Microphone for optimal sound capture on a piano?

Place the Shure SM91 inside the piano, typically on a small cushion or foam pad, near the lower strings. This positioning helps capture both the resonance and attack of the piano sound effectively.

What is the best way to connect the Shure SM91 to a mixing console?

Use a high-quality XLR cable to connect the Shure SM91 to your mixing console. Ensure that phantom power is enabled on the console to power the microphone's condenser element.

How can I prevent feedback when using the Shure SM91 in a live setting?

Position the microphone away from the main speakers and use a graphic equalizer to notch out frequencies that are prone to feedback. Adjusting the microphone's gain structure can also help in minimizing feedback.

What maintenance is required to ensure the longevity of my Shure SM91 Microphone?

Regularly clean the microphone's surface with a soft cloth and keep it stored in a dry, dust-free environment. Periodically check the XLR connections for any signs of wear or corrosion.

Can the Shure SM91 be used for recording vocals, and if so, what is the recommended placement?

While the Shure SM91 is designed primarily for instruments, it can be used for vocals by placing it on a flat surface in front of the vocalist. However, a pop filter is recommended to reduce plosive sounds.

What are common troubleshooting steps if the Shure SM91 is not picking up sound?

Check that phantom power is enabled on your audio interface or mixer. Inspect the XLR cable for any damage, and ensure all connections are secure. If the issue persists, try connecting the microphone to a different input to isolate the problem.

Is it possible to mount the Shure SM91 on a stand, and how can I do it?

The Shure SM91 is primarily a boundary microphone, so it is designed to be placed on flat surfaces. However, you can use a boundary microphone mount or a custom clip to attach it to a stand if necessary.

What features of the Shure SM91 make it suitable for kick drum recording?

The Shure SM91 has a tailored frequency response that emphasizes low-end punch and clarity, making it ideal for capturing the deep tones of a kick drum. Its flat design allows it to be easily placed inside the drum.

How do I clean the Shure SM91 microphone without damaging it?

Use a dry, lint-free cloth to gently wipe the microphone's exterior. Avoid using any liquid cleaners or submerging the microphone in water, as this can damage the internal components.

Can the Shure SM91 be used outdoors, and what precautions should be taken?

The Shure SM91 can be used outdoors, but it should be protected from moisture and extreme temperatures. Use a windscreen to reduce wind noise and consider placing the microphone under a cover to shield it from rain.