Cut Sheet

ROYER SF-12

Stereo Coincident Ribbon-Velocity Microphone

The Royer SF-12 stereo coincident ribbon microphone com-

bines high quality audio performance with outstanding stereo

separation and imaging. It is a modern ribbon design with no

audible diffraction effects or cavity resonance.

The SF-12 is actually two matched ribbon microphones placed

one above the other and fixed at a 90˚ angle. This arrangement

allows for Blumlein and M-S recording with one microphone, as

well as excellent monaural compatibility when summing the two

ribbon elements to mono. The frequency response is excellent

regardless of the angle of sound striking the ribbons and off-axis

coloration is negligible. The SF-12’s extension cable comes with

an adapter which splits into separate left and right XLR connectors,

labeled “upper” and “lower.”

The SF-12’s two 1.8-micron ribbons are of pure (99.99%) aluminum and

provide superb transient response due to their low mass. Each of the SF-12’s

two ribbon transducers incorporate “cross-field” motor assemblies (patent

pending) which are comprised of four powerful Neodymium magnets and

Permendur iron pole-pieces. This cross-field design delivers excellent high

frequency response due to the extremely short path between the front and

rear sides of the ribbon elements. The microphone’s case is ingot iron and

forms part of the magnetic return circuit, an effective system with low leakage

flux which accounts for the relatively high sensitivity in a trim package.

SF-12 FEATURES

• True stereophonic (Blumlein and M-S) recording from one microphone

• No internal active electronics to overload or produce distortion up to

maximum SPL rating.

• Extremely low residual noise

• Ribbon elements unaffected by heat or humidity

• Absence of high frequency peaks, “ringing” and phase shifts

• Equal sensitivity from front and back of elements

• Very low magnetic leakage

• High efficiency toroid matching transformers

• Gold plated XLR contacts

RECOMMENDED APPLICATIONS

• Stereo & distance miking

• Choir, orchestra, string sections

• Drum overheads, room miking

• Percussion instruments

• Brass instruments, horn sections

• Woodwind instruments

• Stereo acoustic piano, harp

• Acoustic guitar, mandolin, stringed instruments

Actual Size

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ROYER SF-12 Stereo Coincident Ribbon-Velocity Microphone The Royer SF-12 stereo coincident ribbon microphone combines high quality audio performance with outstanding stereo separation and imaging. It is a modern ribbon design with no audible diffraction effects or cavity resonance. The SF-12 is actually two matched ribbon microphones placed one above the other and fixed at a 90˚ angle.
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ROYER SF-12 Technical Specifications Acoustic Operating Principle Electrodynamic pressure gradient Polar Pattern Crossed figure-8’s Generating Element 1.8-micron aluminum ribbon Magnets Rare Earth Neodymium Frequency Response 40 - 15,000 Hz ±2 dB Sensitivity -50 dB (re.