ROYER SF-24 — Microphone
ROYER SF-24 — Microphone
Royer SF-24 is a phantom-powered active stereo ribbon microphone based on the passive SF-12, using two matched ribbon transducers stacked as a coincident stereo pair. Each ribbon is angled 45 degrees from center for Blumlein stereo and can also be used for M-S recording or as individual mono channels.
Specifications
Transducer and Pattern
| Microphone type | Phantom-powered active stereo ribbon microphone |
|---|---|
| Operating principle | Electrodynamic pressure-gradient with active electronics |
| Polar pattern | Crossed figure-8s |
| Stereo array | Two matched ribbon microphones stacked in a coincident pair, each aimed 45 degrees from center for Blumlein; supports M-S |
| Ribbon | 1.8-micron aluminum ribbon |
Audio Specifications
| Frequency response | 40 Hz to 15,000 Hz +/-2 dB |
|---|---|
| Sensitivity | -38 dB re. 1 V/Pa +/-1 dB |
| Self noise | Less than 18 dB |
| Output impedance | 200 ohms |
| Rated load impedance | 1 kohm |
| Maximum spl | >130 dB |
Electronics and Connectivity
| Active electronics | Two fully balanced discrete head amplifier systems with specially wound toroidal transformers and ultra-low-noise FETs |
|---|---|
| Power requirement | 48 V phantom power only, 4 mA per channel |
| Output connector | Male 5-pin XLR stereo output; extension cable/Y adapter splits to upper and lower 3-pin male XLRs |
| Mono use | Either side may be used individually as a mono microphone; channels are highly phase compatible when summed |
Physical
| Dimensions | 270 mm length x 39 mm base diameter x 25 mm top diameter |
|---|---|
| Weight | 583 g / 20.5 oz |
Fit and constraints
Intended use
Constraints
To use it
Questions
Which connections, drivers, operating systems, and sample rates are supported by this exact revision?
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What cables, mounts, power supplies, or licenses are included?
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Is the current retailer listing new stock, demo stock, open box, or special order?
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Description
Royer SF-24 is a phantom-powered active stereo ribbon microphone based on the passive SF-12, using two matched ribbon transducers stacked as a coincident stereo pair. Each ribbon is angled 45 degrees from center for Blumlein stereo and can also be used for M-S recording or as individual mono channels. Royer specifies crossed figure-8 polar patterns, 1.8-micron aluminum ribbon elements, active electronics with discrete head amplifiers and custom toroidal transformers, 40 Hz-15 kHz +/-2 dB response, -38 dB sensitivity, self-noise below 18 dB, 200 ohm output impedance, 1 kohm rated load and maximum SPL above 130 dB. The mic requires 48 V phantom power at 4 mA per channel and uses a 5-pin male XLR stereo output. Royer lists dimensions of 270 mm length, 39 mm base diameter and 25 mm top diameter, with 583 g weight.