Royer Labs R121 Matched Pair

Royer Labs R-121 Matched Pair consists of two R-121 ribbon microphones factory-selected and paired on the basis of matched sensitivity and frequency response. The R-121 was introduced in 1998 as the first radically reengineered modern ribbon microphone and remains Royer's flagship model — the industry benchmark for recording electric guitars, brass, drums, and a broad range of acoustic sources. Royer Labs' Grammy Award formally recognizes the R-121's place in the history of recording technology.

Patented offset ribbon — two sonic characters in one body

A 2.5-micron, 99.99% pure aluminum ribbon element is positioned asymmetrically closer to the front (logo) side of the housing — Patent #6,434,252. This arrangement has two practical consequences: first, the ribbon has greater room to deflect rearward within the prime magnetic field under high-SPL conditions, allowing full-frequency response without distortion or ribbon damage directly in front of cranked amplifiers and brass instruments; second, at distances of approximately three feet and closer, the rear side of the microphone captures a noticeably brighter response than the front — effectively two distinct tonal characters from one transducer. The front delivers deep, well-balanced low end, defined mids, and a smooth, non-sibilant top. The rear is the better choice for acoustic guitar, vocals, and softer sources that benefit from added clarity and air.

Matched Pair — stereo consistency and configuration options

Each R-121 MP set is factory-matched for sensitivity and frequency response, enabling ORTF, X-Y, Blumlein, or wide ambient stereo configurations with the confidence that both microphones behave identically. The figure-eight polar pattern provides natural separation and bleed control in multi-instrument tracking environments. Phase linearity — no high-frequency phase shift — simplifies mono summing without comb filtering artifacts. The R-121 contains no active electronics: no FET or tube stages that can overload internally; the only component in the signal path beyond the ribbon and magnet assembly is a miniature impedance-matching transformer. Lifetime warranty to the original owner; first ribbon replacement is free of charge.

KEY FEATURES

• Two factory-matched R-121 microphones with identical sensitivity and frequency response
• 2.5-micron, 99.99% pure aluminum ribbon; rare earth Neodymium magnets
• Patented offset ribbon design (Patent #6,434,252) — higher SPL handling front, brighter character rear
• Maximum SPL 135 dB @ 30 Hz — direct placement in front of high-wattage amplifiers
• Fully passive construction — no active electronics, no internal overload point
• Figure-eight polar pattern: natural separation, bleed control, ambient and orchestral use
• Phase-linear response — no high-frequency phase shift, clean mono summing
• Flat frequency response: 30 Hz – 15 kHz
• Ribbon element unaffected by heat or humidity
• Transformer-isolated from phantom power and miswired cables
• Compact, lightweight body (244 g per microphone)
• Lifetime warranty to original owner; first ribbon replacement free
• Applications: electric guitar amps, brass, drum overheads and rooms, strings, choirs, orchestras, ambience

TECHNICAL SPECIFICATIONS

• Acoustic operating principle: electrodynamic pressure gradient (passive)
• Polar pattern: figure-8
• Generating element: 2.5-micron aluminum ribbon (99.99% Al)
• Magnets: rare earth Neodymium
• Frequency response: 30–15,000 Hz +/- 3 dB
• Sensitivity: -47 dBv re. 1V/Pa
• Output impedance: 300 ohms @ 1 kHz (nominal)
• Rated load impedance: 1,500 ohms
• Maximum SPL: 135 dB @ 30 Hz
• Output connector: XLR 3-pin
• Dimensions: 155.7 mm (L) x 25 mm (W)
• Weight: 244 g (8.6 oz) per microphone
• Finish: Dull Satin Nickel; optional Matte Black Chrome
• Includes: two R-121 microphones, mic clips, carrying case