
The Royer SF-24 is the active, phantom-powered version of the popular SF-12 stereo ribbon microphone. It combines the outstanding stereo imaging and fidelity of the SF-12 with an innovative active electronics system. Thanks to this technology, the SF-24 achieves a sensitivity that is 14 dB higher than conventional passive ribbon microphones and offers a signal performance that is comparable to high-quality condenser microphones.
The SF-24 consists of two precisely tuned ribbon capsules arranged one above the other in a Blumlein configuration. This enables precise stereo imaging with natural spatiality and excellent depth. The 1.8-micron ribbon elements guarantee outstanding transient response, while the innovative magnet/pole-core design ensures a linear frequency response without annoying peaks or dips.
Thanks to the patented Active Ribbon™ technology, the SF-24 has a sensitivity of -38 dB, making it easy to use with any microphone preamplifier. Unlike passive ribbon microphones, which require high preamplification, the SF-24 can also be used with preamplifiers with average gainperformance.
The active circuits are based on specially wound toroidal transformers and ultra-low noise FETs. This design not only ensures excellent signal quality, but also ensures that the microphone delivers sufficient output level even with quiet signal sources without generating additional self-noise.

The SF-24 has been designed to always provide a perfect load for the ribbon elements, regardless of the input characteristics of the microphone preamplifier used. This prevents sound loss and ensures that the microphone always operates with full sonic integrity - even with long cable runs, the signal remains stable and loss-free.
In addition, the SF-24 is fully protected from phantom power, electrical interference or incorrectly wired connections, so there is no risk of damage due to incorrect voltages.
Like the SF-12, the SF-24 delivers an exceptionally realistic stereo recording that not only captures the instrument but also- depending on the positioning - the room acoustics authentically.
The microphone is perfect for:
The two channels of the SF-24 are perfectly matched to each other, ensuring excellent phase fidelity. This not only enables problem-free summing of the two channels for monorecordings, but also prevents unwanted phase artifacts.
Alternatively, a single capsule of the SF-24 can be used as a mono ribbon microphone - ideal for singers or instrumentalists who move around during recording.

The Royer SF-24
Royer SF-24