Specifications for Atlas λ Lambda Mono
Designer: Jonathan Carr
Builder: Yoshinori Mishima (final build, testing), Akiko Ishiyama (preliminary build)
Type: Medium weight, medium compliance, low-impedance moving coil cartridge
Stylus: Lyra-designed long-footprint variable-radius line-contact nude diamond (3um x 70um profile, block dimensions 0.08 x 0.12 x 0.5mm), slot-mounted
Cantilever system: Diamond-coated solid boron rod with short one-point wire suspension, directly mounted into cartridge body via high-pressure knife-edge system
Body: Machined asymmetrical titanium with synthetic composite gemstone
Coils: Two 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 self-impedance
Output voltage: 0.25mV@5cm/sec., 2.4μH inductance degrees (CBS test record, other test records may alter results)
Frequency range: 10Hz ~ 50kHz
Compliance: Approx. 12x10-6cm/dyne at 100Hz
Cartridge body: One-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 screws
Cartridge mounting screws: 2.6mm 0.45 pitch JIS standard
Distance from mounting holes to stylus tip: 9.5mm
Cartridge weight (without stylus cover): 11.6g
Recommended tracking force: 1.62 - 1.72g
Recommended load directly into MC phono input: 104ohm ~ 887ohm (detailed guidelines in instruction manual, finalize by listening)
Recommended load via step-up transformer: Use a step-up transformer designed for 1 - 3 ohms cartridge impedance (step-up transformer’s output must be connected to 10kohm ~ 47kohm MM-level RIAA input, preferably via short,low-capacitance cable)
Recommended tonearms: Medium to Medium-High mass arms recommended, which is bulk of tonearm market
