Datasheet
The Royer SF-24 active stereo coincident ribbon microphone is
the only microphone of its kind available, combining 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-24’s active electronics
(patent pending) produce an output comparable to studio con-
denser microphones and provide an optimum impedance to the
ribbon elements, preventing overdamping of the elements and
assuring consistent microphone performance. The high gain
and low output impedance of the SF-24 allow it to operate with
any microphone preamplifier with phantom power, including
those of nominal gain and input impedance characteristics.
The SF-24 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 elements to mono. The frequency response is excel-
lent regardless of the angle of sound striking the ribbons, and off-axis color-
ation is negligible. The SF-24’s extension cable comes with an adapter which
splits into two separate left and right XLR connectors, labeled “upper” and
“lower.”
The SF-24’s two 1.8-micron ribbons are of pure (99.99%) aluminum and
provide superb transient response due to their low mass. The SF-24’s trans-
ducers 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 contributes to
the mic’s high sensitivity.
SF-24 FEATURES
• True stereophonic (Blumlein and M-S) recording from one microphone
• Operates on standard 48-volt phantom power
• Active electronics provide high output capability
• Absence of high frequency peaks, “ringing” and phase shifts
• Extremely low self-noise
• Ribbon elements unaffected by impedance/load, heat or humidity
• Equal sensitivity from front and back of elements
• Very low magnetic leakage
• Gold plated XLR contacts
RECOMMENDED APPLICATIONS
• Stereo & distance miking
• Choir, orchestra, string sections
• Overhead drums & percussion instruments
• Room miking, distance & ambience miking
• Brass instruments, horn sections
• Woodwinds, flute & other reed instruments
• Stereo acoustic piano, harp
• Acoustic guitar, mandolin, stringed instruments
Reduced Size