Kleos SL Moving Coil Cartridge
The Kleos SL is a special, built-to-order, version of Kleos for expert users with very high-gain, extra low noise phono stages, or alternatively a step-up transformer designed for phono cartridges of 2 – 3 ohms or less.
Although many MC cartridges have good performance, their sound is held back by how they are designed. The problem is, the signal coils should have the same angle as the magnetic circuit during playback, but MC cartridges are typically designed so that the opposite happens – applying normal tracking force pushes the coils out of alignment. This impairs coil sensitivity and linearity, and reduces sound quality.
Lyra’s “New Angle” technology solves this fundamental problem by compensating for how the signal coils are affected by vertical tracking forces, and optimally aligning the coils when it matters most – during playback. Introduced on our entry-level Delos, the New Angle technology enables the Delos to perform well above its pricepoint.
But being audiophiles, we wanted to achieve the next higher level – which is the new Kleos. Building on New Angle technology, the Kleos innovates with a stronger chassis machined from aircraft-grade alloys, narrowed mounting area to improve energy transfer, and pre-stressed construction combining multiple materials with non-parallel surfaces to inhibit internal body resonances. The fully hand-made Kleos also has a Lyra-designed line contact stylus and platinum-plated output pins, achieving an exceptionally quiet noise-floor with superior immediacy, resolution and tracking, wide dynamic range and explosive transients, plus a warmer and natural tonal balance. The Kleos is a high-value cartridge that surpasses the sound quality of substantially more expensive cartridges.
Yoshinori Mishima (final build, testing), Akiko Ishiyama (primary build)
Medium weight, medium compliance, low-impedance moving coil cartridge
Lyra-designed long-footprint variable-radius line-contact nude diamond (3um x 70um), slot-mounted
Solid boron rod with short one-point wire suspension, directly mounted into cartridge body
Single layer, 6N high-purity copper, square-shaped chemically-purified high-purity iron former, 2.7ohms self-impedance
0.5mV@5cm/sec., zero to peak, 45 degrees (CBS test record, other test records may alter results)
10Hz ~ 50kHz
Greater than 30dB at 1kHz
Approx. 12×10-6cm/dyne at 100Hz
One-piece machining from solid 7075 alloy billet, with reduced-surface higher-pressure headshell contact area, partially non-parallel 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
Cartridge weight (without stylus cover)
1.65g – 1.75g (1.72g recommended)
Recommended load directly into MC phono input
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)
Medium to Medium-High mass arms recommended, which is bulk of tonearm market