Shure SM81 User Guide

Shure SM81 Microphone manual cover
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Shure SM81 Microphone Specification

The Shure SM81 Microphone is a high-quality, unidirectional condenser microphone designed for professional studio recording and live performance. It is renowned for its flat frequency response, ranging from 20 Hz to 20 kHz, which ensures accurate audio reproduction across a wide range of frequencies. The microphone features a cardioid polar pattern, offering superior off-axis rejection to minimize unwanted background noise and feedback, making it ideal for capturing acoustic instruments, cymbals, and overheads with exceptional clarity.

The SM81 is equipped with a low-noise, transformerless preamplifier circuitry that provides clear, transparent sound. Its rugged construction and durable design include a stainless steel grille and a solid aluminum housing, ensuring reliability and longevity even under demanding conditions. Additionally, the microphone is fitted with a three-position low-frequency roll-off switch, allowing users to tailor the bass response to suit different acoustic environments and reduce proximity effect.

The SM81 operates on phantom power, with a wide operating voltage range from 11 to 52 V DC, making it compatible with most professional audio equipment. Its compact and lightweight design facilitates easy positioning and mounting, while the included swivel adapter ensures flexible placement. The microphone also comes with a foam windscreen to minimize wind noise and plosives during recording or live performances. Overall, the Shure SM81 is a versatile and robust microphone that consistently delivers pristine audio quality, making it a preferred choice among sound engineers and musicians worldwide.

Shure SM81 Microphone F.A.Q.

How do I set up the Shure SM81 for optimal sound quality?

To set up the Shure SM81 for optimal sound quality, ensure it is mounted on a stable stand. Position it at the desired distance from the sound source, typically 6-12 inches for most applications. Use the low-frequency roll-off switch to reduce handling noise or room rumble if necessary.

What is the best use case for the Shure SM81 microphone?

The Shure SM81 is ideal for capturing acoustic instruments, such as guitars, pianos, and cymbals, due to its flat frequency response and low self-noise.

How can I reduce unwanted noise when using the SM81?

To reduce unwanted noise, use the built-in low-cut filter to eliminate low-frequency rumble. Additionally, make use of shock mounts and wind screens to minimize handling noise and plosives.

What maintenance is required to keep the Shure SM81 in good condition?

Regularly clean the microphone with a dry, soft cloth to remove dust. Store it in a dry, cool place in its case when not in use. Periodically check the cable and connections for wear or damage.

How do I troubleshoot signal loss with my SM81 microphone?

Check the microphone cable for breaks or loose connections. Ensure the phantom power is turned on, as the SM81 requires it to operate. Test the microphone with a different cable and mixer to isolate the issue.

Can the SM81 be used for live sound applications?

Yes, the SM81 is suitable for live sound applications, particularly for overheads, hi-hats, and acoustic instruments, due to its rugged build and excellent sound quality.

What type of polar pattern does the SM81 have and why is it important?

The SM81 has a cardioid polar pattern, which helps focus on the sound source while rejecting ambient noise from the sides and rear, making it ideal for isolating instruments in a mix.

How can I prevent feedback when using the SM81 on stage?

Position the microphone away from monitors and speakers. Use the cardioid pattern to your advantage by pointing the rear of the mic towards potential feedback sources. Adjust EQ settings to reduce frequencies that may cause feedback.

What should I do if the SM81 picks up too much background noise?

Reposition the microphone closer to the sound source to increase the signal-to-noise ratio. Employ the low-cut filter to reduce low-frequency background noise. Consider using acoustic treatment in the recording space if possible.

Is it possible to use the SM81 for recording vocals?

While primarily designed for instruments, the SM81 can be used for vocals, especially if a flat and natural response is desired. However, it's recommended to use a pop filter to minimize plosives and sibilance.