Shure SM58: Is This Dynamic Microphone Right for You?

The Shure SM58 is a cardioid dynamic vocal microphone with an XLR connector. It is built for close speech and singing, and it picks up most strongly from the front and less from the sides and rear. That makes it a good fit for untreated rooms and noisy setups, but it does not plug straight into a computer. This guide covers what you need before buying or connecting one, how to set it up for calls and recording, and how to tell whether it is working well.

Before you start

Decide whether the SM58 matches how you work. It suits you if you speak or sing close to the microphone, want less pickup of room echo and background noise, and are willing to use an XLR setup. It is a weaker fit if you want a single USB cable with no extra hardware, or if you plan to sit far from the microphone. Dynamic microphones need you to stay close to the capsule to sound full and clear.

Gather these items before you connect it:

• An XLR cable, unless your package already includes one. Some versions are sold without a cable, so check the box contents.
• An audio interface, mixer or other device with an XLR microphone input. A computer cannot use the SM58 directly through its headphone jack or a standard USB port.
• A microphone stand or boom arm, so you can keep a steady distance from the microphone.
• Headphones, so you can monitor yourself without speaker sound leaking back into the microphone.

The SM58 is a passive dynamic microphone and does not need phantom power or batteries. Everything runs locally through your interface or mixer and its driver; no online service is involved in capturing sound. Any software you use afterwards, such as a calling app or a cloud editor, has its own privacy and file handling terms, which you should read for that specific product rather than assume.

The SM58 has relatively modest output, so it needs a fair amount of gain. Before you buy an interface or adapter for it, check that its preamp has enough clean gain for a dynamic vocal microphone. If it does not, an inline microphone booster is a common addition.

Step-by-step instructions

• Turn the interface or mixer gain all the way down and switch off phantom power on the channel you plan to use. The SM58 does not need it, and keeping it off is the simplest option.
• Connect the XLR cable from the microphone to the interface or mixer input. If your model has an on/off switch, set it to on.
• Connect the interface to your computer and install any driver or control software the manufacturer provides for your operating system.
• In your operating system's sound settings, choose the interface as the input device. If you monitor through the interface's headphone output, choose it as the output device as well.
• In your calling or recording app, select the same interface as the microphone. Apps often keep their own device choice separate from the system default.
• Position the microphone a few finger-widths from your mouth, pointing the front of the grille toward you. Speaking into the side or rear lowers the level and lets in more room sound.
• Speak at your normal volume and raise the gain slowly until the input level peaks clearly but never reaches clipping. Leave some headroom for louder moments.
• If your software lets you choose a sample rate, use the same rate on the interface and in the app, for example the rate your project or calling app already expects. Mismatched settings can cause crackles or errors on some systems.

Each step can be reversed. If something goes wrong, turn the gain down first, then go back to the previous device selection in your system and app settings.

Distance changes the sound noticeably. Moving closer adds bass because of the proximity effect, while moving away makes the voice thinner and quieter. Choose a distance that sounds natural and keep it consistent. The built-in grille reduces some breath pops, but a foam windscreen can help if you speak very close.

Check the output

Record a short sample in any recording app or use a microphone test page, then play it back through headphones. Listen for these points:

• Your voice is clear and at a comfortable level without turning the playback volume up a lot.
• The level meter stays below the maximum on your loudest words. Flat-topped peaks or harsh distortion mean the gain is too high.
• In quiet pauses, background noise is low. A steady hiss usually means the gain is high and you should move closer and lower it.
• There is no hum, buzz, crackle or intermittent dropout.

For video calls, ask the other person how you sound. Calling apps may apply their own noise suppression, automatic level control and compression, so a call can sound different from a local recording. If the app allows it, compare the result with and without its processing.

Final quality also depends on your interface preamp, cable, room and the app's processing. The SM58 cannot correct for a weak preamp or for speaking too far away, so judge the microphone together with the whole chain.

Common problems and next steps

No sound at all: check that the XLR cable is fully seated at both ends, that the on/off switch is on if present, and that the interface is selected as the input device in both the system settings and the app. Confirm that the channel you plugged into is the one the app is listening to.

Very quiet signal even at high gain: move closer and speak into the front of the grille. If the level is still too low, the preamp may not have enough gain for this microphone; an inline booster or a different interface usually solves this.

Hiss or noise in pauses: reduce gain and close the distance instead. Turn off unused channels and app-side gain boosts, and keep the cable away from power adapters.

Hum or buzz: try a different cable and a different power outlet or USB port, and move the cable away from power supplies. Ground-related hum often comes from the computer or interface power, not the microphone itself.

Echo heard by others on calls: wear headphones so your speakers do not feed back into the microphone, and switch off direct monitoring through the speakers.

Cheap XLR-to-USB adapters: some can work with a dynamic microphone, but their gain and noise performance vary widely. Check that a specific adapter states support for dynamic microphones before relying on it.

If the SM58 does not fit your setup after testing, consider what bothered you most. Needing a simpler single-cable connection points toward a USB microphone, while needing more detail from a distance points toward a condenser microphone used in a quieter room. If you like the focused, close-up sound and the rejection of room noise, the SM58 with a suitable interface is a dependable choice.