The KSM313 is a premium bidirectional ribbon microphone for world-class audio recording and performance. The "Dual-Voice" design features discrete front and rear sonic signatures to accurately capture intimate vocals or intricate instrumentation.
The KSM313 is hand-assembled from state-of-the-art transducers, transformers and metals as the pinnacle of Shure quality. The revolutionary Roswellite®ribbon material replaces traditional foil ribbons with high tensile strength, toughness and shape-memory, providing superior resilience at extreme sound pressure levels (SPLs).
Ribbon microphones perform optimally with the least amount of loading on the ribbon element as practical. The higher the impedance input on the microphone, the better the low-end and mid-range frequencies are represented in the output signal. Shure recommends using preamps with impedance settings of 1000 Ohms or more, although different load impedances may be used for a desired sound quality.
This is a low-noise microphone. The combination of its efficient transducer, robust shielding, and custom transformer produces a low noise floor and output level equal to moving coil microphones.
Shure ribbon microphones have an exceptionally smooth, natural response and perform best with preamps that provide simple, transparent gain. However, Shure encourages experimentation to find the desired combination of color and transparency.
The unique Dual-Voice design of the KSM313 produces discrete front and rear sonic signatures. Position the sides, the null points of a bidirectional microphone, towards any unwanted sound sources. Some typical applications are listed below.
*When addressing the back side of a bidirectional mic, please remember to invert the signal polarity. Shure’s A15PRS accessory is an in-line, balanced, polarity-reversing switch capable of this operation and is available online at: store.shure.com
Thread the supplied stand adapter onto a floor or boom stand and insert the microphone.
Note: To reduce low-frequency vibrations transmitted through the stand, use an isolating shock mount. Visit www.shure.com for more information.
Directional microphones progressively boost bass frequencies as the microphone is placed in closer proximity to the source. This phenomenon, known as proximity effect, can be used to create a warmer, more powerful sound.
To protect your microphone, keep a few simple precautions in mind to ensure long-term performance:
Dual-Voice Roswellite® Ribbon
30 to 15,000 Hz
open circuit voltage, @ 1 kHz, typical
-54.5 dBV/Pa  (1.88 mV)
146 dB SPL
Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
400 g (14 oz.)