ROYER SF-24
Phantom-Powered Stereo Ribbon Microphone
The Royer SF-24 is a phantom-powered stereo ribbon microphone, a refined version of the popular SF-12 stereo ribbon microphone. It inherits the SF-12's exceptional audio performance, stereo separation, and imaging while introducing an exclusive active electronics system designed for ribbon microphones. The SF-24's output of -38 dB surpasses its non-powered counterpart, the SF-12, by a significant 14 dB, placing its sensitivity on par with phantom-powered condenser microphones. The microphone's unique electronics and custom-designed FETs ensure ultra-quiet operation with self-noise lower than 18 dB.
The Royer SF-24 stands as a versatile stereo ribbon microphone with enhanced sensitivity, making it a powerful tool for a broad range of recording applications. Whether capturing the nuances of acoustic instruments or delivering realistic stereo imaging, the SF-24 excels in delivering high-quality audio reproduction.
Key Features:
- Phantom-Powered Stereo Design:
- The SF-24 integrates phantom-powered active electronics into a stereo ribbon microphone setup, delivering superior sensitivity and versatility.
- Coincident Pair in Blumlein Configuration:
- Similar to the SF-12, the SF-24 comprises two matched ribbon microphones arranged in a Blumlein configuration. Each ribbon is positioned 45 degrees from center, providing outstanding stereo imaging.
- Dual 1.8-Micron Ribbons:
- The SF-24 incorporates two 1.8-micron ribbons, each weighing approximately 1/3 milligram. These ribbons contribute to superb transient response and a wide, uniform frequency response.
- Magnet/Pole Piece Structures:
- The ribbon transducers utilize magnet/pole piece structures, ensuring a consistent frequency response without substantial peaks or dips.
- Ingot Iron Case:
- Crafted from ingot iron, the microphone's case forms part of the magnetic return circuit. This design minimizes leakage flux and enhances sensitivity in a compact form.
- Y Adapter with Separate XLR Connectors:
- The SF-24 comes with an extension cable featuring a Y adapter that splits into separate 3-pin male XLR connectors labeled “Upper” and “Lower” for the upper and lower capsules of the microphone when held vertically.
- 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
Recording Applications:
- Stereo Recordings:
- The SF-24 excels in creating realistic stereo recordings, capturing both the instrument and the acoustical space. Ideal for classical piano, drum overheads, ensemble and orchestral recordings, percussion instruments, acoustic instruments, vocal ensembles, and choirs.
- Mono Recording:
- The SF-24 offers excellent phase compatibility between its two sides, allowing for mono recording without introducing undesirable phase artifacts. This is advantageous when capturing a wide sound field in mono or accommodating singers who move off the "sweet spot."
- Individual Mono Use:
- Either side of the SF-24 can be used individually as a mono microphone.
- Drum Overheads
- Percussion Instruments
- Brass and Woodwinds
- Acoustic Piano
- Harp
- Choirs
- Solo Strings
- String Sections
- Orchestra
- Acoustic & Electric Guitars
- Vocal Groups
- Ambiance
- Stereo to Mono
Gain and Impedance Matching:
- Sensitivity:
- The SF-24's sensitivity is comparable to phantom-powered condenser microphones, allowing compatibility with a wide range of mic preamplifiers or board preamps.
- Low Self-Noise:
- Despite the increased sensitivity, the SF-24 maintains low self-noise due to its unique electronics and large, specially wound toroidal transformers.
- Impedance Matching:
- The electronics provide a perfect load to the ribbon elements, ensuring 100% sonic potential regardless of the mic preamp characteristics. The low-impedance output allows for extended cable runs with minimal signal loss.
