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The Lyra Atlas Mono is a version of the Atlas designed for monaural records.
On mono records, the vertical axis of the groove contains no musical information, but it will frequently have noise, in the form of groove damage and dirt. With two separate mono coils, the Atlas Mono has been designed to be completely insensitive to the vertical axis, which greatly improves the signal/noise ratio without any downside on monaural records. The separate coils also help avoid possible ground loops and hum problems that could otherwise be caused if a single coil is fed into a stereo two-channel amplification system.
All Lyra cartridges are designed by Jonathan Carr in collaboration with Yoshinori Mishima, and manufactured by Lyra in Japan. Yoshinori personally checks and fine-tunes every Mono before it is shipped.
TypeMedium weight, medium compliance, low-impedance, low-output moving coil cartridgeStylusLyra-designed long-footprint variable-radius line-contact nude diamond (3um x 70um profile, block dimensions 0.08 x 0.12 x 0.5mm), slot-mountedCantileverDiamond-coated solid boron rod with short one-point wire suspension, directly mounted into cartridge body via high-pressure knife-edge systemCoilsTwo individually isolated monophonic/monaural 6N high-purity copper coils wound in parallel (on top of each other) on a square-shaped chemically-purified high-purity iron former with 3.0 Ohms internal impedanceOutput0.25 mV@5 cm/secFrequency range10 Hz-50 kHzChannel separation35 dB or better at 1 kHzComplianceApprox 12 X10 cm/dyne at 100 HzVertical tracking angle20 degreesCartridge bodyOne-piece machining from solid titanium billet, with reduced-surface higher-pressure headshell contact area, predominately non-parallel and asymmetrical shaping, phase-interference resonance-controlling mechanism, and body threaded directly for mounting screwsDistance from mounting holes to stylus tip9.52 mmCartridge weight (without stylus cover)11.6 gRecommended tracking force1.65 ~ 1.78g (1.72g recommended)Recommended load directly into MC phono inputDetermine by listeningRecommended load via step-up transformerStep-up transformer designed for 2 - 3 Ohms cartridge impedance; the transformer output must be connected to standard 47 kohm MM-level RIAA input, preferably via short, low-capacitance cable
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