The R-122 is the world's first phantom powered, active ribbon™ microphone. Its unique electronics package gives the R-122 greater output than standard, non-powered ribbons, and places a perfect impedance load on the ribbon element, greatly expanding the number of preamps the mic operates well with.Before the R-122, all ribbon microphones were passive devices. Tracking strings, acoustic guitars, vocals and other quieter sound sources required pre's with a lot of gain and a high input impedance. With the R-122, gain and impedance issues are a thing of the past, letting you use more pre's with great results.GainConventional ribbon microphones need high-quality, high-gain microphone preamplifiers to record softer sound sources. The R-122 is as sensitive as a condenser microphone, allowing you to use practically any mic preamplifier or board pre's to record even the quietest sounds. The R-122 contains a fully balanced, discrete head amplifier system utilizing a specially wound toroidal transformer and ultra-low noise FET's. This system is extremely quiet, can handle 135 dB SPL, and brings the R-122's sensitivity to 37 dB! Go ahead and plug an R-122 into any preamp with average gain - you'll get full Royer performance and enough level to drive any recording medium.The R-122's higher sensitivity does not create additional self-noise. All of the R-122's increased sensitivity comes from its large, specially wound toroidal transformer - that wonderful thing called "free gain." The phantom powered circuitry provides impedance conversion only, adding no noise of its own.Impedance MatchingThe R-122's active electronics put a perfect load on the ribbon element at all times, allowing the R-122 to deliver 100% of its full sonic potential regardless of the input characteristics of the following mic pre. Due to its low-impedance output, R-122's can be used on extremely long cable runs with minimal signal loss. In addition, the ribbon element can't be damaged by phantom power, miswired cables or electrical glitches.Patented Offset Ribbon TechnologyThe R-122's proprietary offset ribbon transducer (Patent # 6,434,252) is the first of its kind, positioning the ribbon element closer to the front (logo) side of the microphone. This arrangement gives the ribbon more room to move within the prime magnetic field while maintaining full frequency response during high SPL recordings. It's an integral piece of the magic of all Royer R-series microphones. Royer Labs R-122 Features Phantom powered circuitry provides high output and impedance matching High SPL Capabilities No distortion up to maximum SPL rating Extremely low residual noise Ribbon element is not affected by heat or humidity Absence of high frequency phase distortion Equal sensitivity from front or back of element Consistent frequency response regardless of distance Rear side of mic records slightly brighter when three feet or closer to sound source Royer Labs R-122 Specifications Acoustic Operating Principle: Electrodynamic pressure gradient with active electronics Polar Pattern: Figure-8 Generating Element: 2.5-micron aluminum ribbon Magnets: Rare Earth Neodymium Frequency Response: 30 -15,000 Hz +/- 3dB Sensitivity: -37 dB (referenced 1v/pa +/- 2dB) Self-Noise: < 20 dB Output Impedance: 200 Ohms, balanced Rated Load Impedance: 1K-Ohm Maximum SPL: >135dB Output Connector: Male XLR 3 pin (Pin 2 Hot). Dimensions: 206mm L X 25mm W (8 1/8" L X 1" W) Weight: 309 grams (10.9 oz) Finish: Dull Satin Nickel/Matte Black Chrome optional.
...GLM 8200 -> Vari-Mu Fron of kit - Royer R121 Room L - M149 Room R - M149 Amb L+R (Blumlein in hallway) - Royer R122's -> 1176's Below drum riser mic - E901
...in the KT unit: C70, C95 150pF 2% C0G 0603 R86, R121 12K 1% 0402 R87, R128 12K 1% 0603 R88, R122 3K3 1% 0402 R89, R123 330K 1% 0402 R100, R109 2K7 1% 0402 Also the diode-resistor in series as described previously also has to be fitted (to enable the Mode 1 delay to be...
...might ask Royer if that's a good idea for your microphone, or if not, what is. BTW which exact model of R-122 do you have? EDITED to add: Shure sells a little XLR RF filter (A15RF) which I suspect works the way I described above, but outside the mic rather than in it. It's just...