Shure KSM313 Dual-Voice Ribbon Microphone with RoswelliteThe Shure KSM313 features a Dual-Voice ribbon assembly that lets users choose from two different sound signatures.
Addressing the front of the KSM313 mic delivers a warm, full sound that is ideal for many instruments while addressing the rear side offers a bright, articulate sound that complements vocals. The KSM313 is a premium bi-directional ribbon microphone for world-class audio and performance. The Dual-Voice design features discrete front-and-rear side sonic signatures for use with amplified instruments or in intimate vocal applications. Hand assembled in the USA with custom components and proprietary Roswellite technology for revolutionary ribbon resilience under extreme conditions.
Shure KSM313 Microphone Features:
- Bi-directional polar pattern delivers premier audio with superior off-axis rejection
- True Dual-Voice tuned specifically for user’s for choice of response - warm and full for amplifiers, or swivel for bright and flattering vocals
- Revolutionary Roswellite proprietary ribbon material replaces traditional foil ribbons with high tensile strength, toughness and shape memory that provides superior resilience at extreme SPLs
- Custom-sourced components for superior presence, minimized signal loss and maximized output.
- 146dB SPL across 30 – 15,000 Hz frequency response ideal for capturing fast transients in vocals, acoustic instruments and concert halls
- Legendary Shure quality and superior construction from hand-assembly of machined steel, silver, gold and aluminum materials
- Monocle stand mount custom swivel mount for fully versatile placement and orientation
- Protective wood case included for storage when not in use
The high-tensile strength, toughness and shape memory of Roswellite ribbon material replaces traditional foil ribbons for superior resilience at extreme SPLs.
With unique technology and application features, alongside superior materials and construction, Shure KSM Ribbon Microphones are the necessary choice for the world’s most accomplished studio and live performances.
Frequency Response 30Hz-15,000Hz

Shure KSM313 Dual-Voice Ribbon Microphone with Roswellite Specifications
- Transducer Type: Roswellite Ribbon
- Frequency Response: 30Hz – 15,000Hz
- Directional Polar Pattern: Bidirectional
- Output Impedance: Transformer, balanced, actual 270Ω
- Polarity:
- Positive pressure on front side of ribbon
- Positive voltage on pin 2 relative to pin 3, pin 1 ground
- Sensitivity (at 1 kHz, open circuit voltage): -54.5 dBV/Pa (1.88 mV/Pa)
- Max SPL: 146 dB
- Connector: Three pin professional audio (XLR) male
Dimensions & Weight:
- Diameter: 4.32 cm (1.7 in)
- Height: 13.5 cm (5.3 in)
- Weight: 400g (0.881 lbs)
- Weight: 597g (1.131 lbs) with monocle mount