Royer SF-24 Active Stereo Ribbon Microphone

Article number: SF-24
Availability: Ships from manufacturer
Delivery time: Normal delivery time is 2-7 business days, subject to availability.
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 condenser 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 excellent regardless of the angle of sound striking the ribbons, and off-axis coloration 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. Features Phantom powered circuitry provides high output and impedance matching True stereophonic (Blumlein and M-S) recording from one microphone High SPL capabilities No distortion up to maximum SPL rating< Extremely low residual noise Ribbon elements are not affected by heat or humidity Absence of high frequency phase distortion Equal sensitivity from front or back of elements Consistent frequency response regardless of distance High efficiency, matching toroidal transformers Very low magnetic leakage Includes 25’ Cable (XLR5 to 2 standard 3-pin XLR male), shock mount, protective case, mic sock Specifications Acoustic Operating Principle: Electrodynamic pressure gradient with active electronics Polar Pattern: Crossed figure-8's Generating Element: 1.8-micron aluminum ribbon Frequency Response: 40-15,000 Hz +/- 2dB Sensitivity: -38 dB (re. 1v/pa +/-1dB) Self-Noise: < 18 dB Output Impedance: 200 Ohms Rated Load Impedance: 1K-Ohm Maximum SPL: >130dB Output Connector: Male XLR 5 pin (stereo*) Power Requirements: 48-Volt Phantom Only Supply Current: 4 mA per channel Dimensions: 270mm X 39mm (base) X 25mm (top) (10 5/8" X 1.5" X 1") Weight: 583 grams (20.5 oz) Finish: Optical Black, 18K Gold (optional)
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