Shure KSM313: Is This Ribbon Microphone Right for You?

The Shure KSM313 is a passive ribbon microphone with a figure-8 pickup pattern and a dual-voice design: its two sides are voiced differently, so turning the mic around gives you a warmer or a brighter character from the same ribbon. This guide helps you decide whether it fits your setup, then shows how to connect it, set it up for recording or video calls, and check the result.

Before you start

The KSM313 is a good fit if you want a smooth ribbon sound for voice, acoustic instruments or guitar amplifiers, and you already have, or plan to buy, an interface with strong preamps. It is a weaker fit if you want a plug-and-play USB microphone, work in a noisy untreated room, or move around a lot while speaking. Check current availability and pricing with retailers before you commit.

Confirm these prerequisites before connecting anything:

• Audio interface or mixer: the microphone has an XLR connector and does not plug directly into a computer. The interface becomes the input device that your computer and apps see.
• Enough clean gain: ribbon microphones have low output, so the preamp needs plenty of gain without hiss. If your preamp is modest, an inline microphone booster rated for ribbon microphones can help; verify compatibility before buying one.
• Phantom power awareness: a passive ribbon microphone does not need phantom power. Check Shure's documentation for how this model tolerates it, and as a safe habit switch phantom power off on that channel before connecting or disconnecting the mic.
• A good XLR cable and a sturdy stand: a damaged cable or an unstable stand is a common cause of noise and accidents.
• A pop filter for close voice work: ribbons are delicate, so avoid blowing into the microphone, strong air movement and wind.
• Local operation: the signal path is microphone, interface, computer. No account or online service is required for the microphone itself. Any recording or call app you use handles files under its own policy, so verify where recordings are saved and whether the app uploads them.

Step-by-step instructions

• Mount the microphone on its stand mount and position it before you connect it, so you are not adjusting a live channel.
• On the interface, turn the gain for the target channel fully down and make sure phantom power is off for that channel.
• Connect the XLR cable from the microphone to the interface input, then connect the interface to your computer and power it on.
• Choose a side. Identify the two sides using the markings and the user guide, aim the one you want toward the source, and later record a short pass with each to compare.
• Set the distance. Ribbon microphones show proximity effect, so bass increases as you move closer. Start at a moderate distance and move in for more warmth.
• Aim around noise. The figure-8 pattern picks up equally from front and rear and rejects sound from the sides. Point a side toward noise sources such as a computer fan, and keep the rear facing a quiet or soft area.
• Select the interface as the input device in your operating system's sound settings and again inside your recording or call app, since apps can keep their own selection.
• Select headphones connected to the interface as the output device so you can monitor without speaker sound leaking back into the microphone.
• Match the sample rate. Use the same rate in the interface's control software (if it has one), the operating system and the app. Pick the rate your project or app expects.
• Set the input level. Speak or play at your real performance volume and raise the gain until peaks sit comfortably below clipping on the interface and app meters, leaving headroom for louder moments. If your app offers automatic gain control and it fights your manual setting, consider turning it off.
• Note your settings. To undo the setup, turn the gain down, switch the input and output devices back to their previous choices, and restore the previous sample rate.

Check the output

Record a short test at your normal volume and listen on headphones. Check that the meters never reached clipping and that the level was not so low that you need to boost it heavily afterwards, because boosting a quiet ribbon recording also raises preamp hiss.

Listen for three things: whether the chosen side suits the source, whether the bass from proximity effect is too heavy or too light, and how much room sound the rear of the microphone captured. Then open the file information or export settings in your app to confirm the file format and sample rate match what your project needs.

For video calls, remember that call apps often apply their own processing, such as noise suppression, so the other person hears a processed version of your local recording. Use the app's built-in audio test if it has one, or make a short test call with someone you trust. Afterwards, check where any test file was saved and delete it if you no longer need it.

Common problems and next steps

• No sound at all: confirm the interface is the selected input device in both the system and the app, the cable is seated, you are on the correct input channel and the gain is up. Also check that your operating system's microphone privacy permissions allow the app to use the microphone.
• Very quiet or hissy signal: the preamp is likely short on clean gain. Move closer to the microphone, use a higher-gain preamp, or add a ribbon-compatible inline booster.
• Sound is thin or dull: try the other side of the microphone and adjust the distance before reaching for EQ.
• Too much background noise or room echo: the rear of the figure-8 pattern is live. Reposition so the rear faces a quiet or soft surface, use the side rejection against noise sources, and add soft furnishings if the room is reflective. Use app noise suppression sparingly, as heavy settings can make speech sound unnatural.
• Distortion, clicks or pitch problems: lower the input level first. If clicks persist, check for a sample rate mismatch between the interface, the system and the app.
• Others hear an echo in calls: use headphones and make sure the correct output device is selected so speaker sound does not reach the microphone.
• Sudden change in sound: if the microphone suddenly sounds weak, buzzy or distorted, stop using it and contact Shure support or an authorized service centre rather than opening it yourself.
• Next step if it is not the right fit: if you mainly need simple, robust audio for video calls, a USB or dynamic microphone may suit you better. The KSM313 makes the most sense when the ribbon character is your priority and you can give it a capable preamp and a reasonably quiet room.