What is the difference between Royer R-series and SF-series mics?

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The best way to explain the differences between R-series mics (R-121, R-122 MKII, R-122V) and SF-series mics (SF-12, SF-24, SF-1) is to take a look at their ribbon transducers (the transducer is the magnetic frame or assembly that the ribbon element is housed in). This is the R-121 transducer (also used in R-122 MKII’s and

Can my SF-12 stereo microphone be upgraded to an SF-24?

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An SF-12 cannot be upgraded to SF-24 specification. Although the SF-12 and the SF-24 share the same transducer assemblies and have similar sonic characteristics, they are two very different microphones. The impedance matching transformers that are integral to each model are very different electrically and physically. The SF-24’s active electronics will not work with the

Can the SF-12 also be used as a mono mic?

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Yes, in two different ways. The SF-12 sums to mono extremely well, so you can combine the outputs of both channels into one channel for a mono track. Or, being that an SF-12 is made up of two identical mono ribbon elements, positioned one above the other, you can use either side of the SF-12

Is the SF-12 a stereo version of the R-121?

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No. The magnet system and ribbon elements of SF-12’s and R-121’s are entirely different, and the response and recommended uses for each mic are somewhat different. In my opinion, the SF-12 has a slightly smoother response and somewhat better figure-8 pattern. Did this answer your question?Yes   NoAdditional CommentsSend Feedback

I’ve got an electrical buzz on one side of my SF-12.

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Some preamplifier designs are prone to developing internal ground loops when used in conjunction with stereo microphones such as the Royer SF-12. A ground loop manifests itself as unwanted noise, buzz or hum (usually 60Hz or 120 Hz). The problem may be more apparent with lower output microphones such as dynamics or passive ribbons because

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