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Kleos Mono Cartridge

Lyra · Kleos

Lyra Kleos Mono Cartridge

$4,995

Trade-in availableSignature technologiesThe Lyra story

Not currently in our rooms. For a serious buyer we will often bring a piece in from the manufacturer for a private session — tell us about your system and what you are weighing it against, and we will advise.

Lyra · Kleos

A true mono version of the Lyra Kleos, built to order for people who take their mono records seriously.

Built to order; allow several weeks.

0.25 mV
output
True mono
generator
1.72 g
tracking force (recommended)
8.8 g
weight
Ask about hearing this Call (503) 222-2599

Authorized Lyra dealer · Delivery and installation by Pearl Audio · Trade-ins welcome

The story

A mono groove carries all of its music side to side; the vertical axis holds nothing but noise from wear, damage and dirt. The Kleos Mono is built to ignore it. Instead of the 45° coil former used in stereo cartridges, its square iron former sits parallel to the record surface, and its coils are wound to produce signal only from horizontal stylus movement. Lyra uses two separate, isolated coils, so the cartridge can feed a normal stereo system without tying the two channels together electrically, which avoids ground-loop and hum problems. The rest is pure Kleos: a one-piece 7075 aluminum body, a solid boron cantilever and Lyra's variable-radius line-contact stylus, hand-built in Japan with final assembly and testing by Yoshinori Mishima.

Because it rejects vertical groove noise, Lyra says the Kleos Mono gives a much better signal-to-noise ratio on mono records, with no downside. Its two coils can run in parallel into a stereo system, or one channel can be used alone with a single amplifier and speaker. For more output in a one-amp mono setup, the coils can be wired in series through a short headshell lead. At 0.25 mV it needs a high-gain, low-noise MC phono stage or a step-up transformer designed for low-impedance cartridges, and a rigid tonearm of medium to medium-high mass. Reviewers have praised the stereo Kleos for its smooth, detailed and tonally balanced sound.

The Kleos Mono is built to order and sits alongside the stereo Kleos in Lyra's range. Lyra does not retip: a worn Kleos Mono is exchanged for a new one through MIBS Distro at $2,995 instead of $4,995, and any other Lyra cartridge traded in brings it to $3,935.

Lyra began in Tokyo as Scan-Tech, whose first cartridge, the Tsurugi of 1986, started the line that runs through the Clavis and Helikon to the Kleos, and every cartridge is still built by hand in Japan with Yoshinori Mishima doing the final build and testing. The Kleos of 2010 brought the full boron cantilever and coil system of the larger models to a one-piece alloy body, two years after the Delos introduced New Angle. Read the Lyra story →

Key technologies

  • New Angle coil geometry. The coils are pre-angled so that tracking force brings them into exact alignment with the magnetic field, which is when it matters.
  • One-piece 7075 alloy body. Machined from a single billet with non-parallel surfaces and a narrow headshell contact area, so resonance is dissipated rather than stored.
  • Variable-radius line-contact stylus. A nude 3 × 70 µm diamond on a solid boron cantilever.
  • True mono generator. Coils that respond only to lateral groove motion, so vertical noise and wear on mono LPs are not reproduced.
  • Hand built in Japan. Built and tested by hand, with final assembly by Yoshinori Mishima.

The stereo Kleos shares the body, cantilever and stylus; the Etna λ Mono is the next mono Lyra up.

Specifications
Type Mono low-output moving coil (MC), medium compliance; built to order
Output 0.25 mV (5 cm/s)
Internal impedance 5.4 Ω; 9.0 µH inductance
Coils Two isolated mono 6N copper coils on a square high-purity iron former, parallel to the record surface
Recommended load 95–816 Ω direct into MC input (finalize by listening); via step-up transformer: one designed for 1–3 Ω cartridges, into a 10–47 kΩ MM input
Tracking force 1.65–1.75 g (1.72 g recommended)
Compliance Approx. 12 × 10⁻⁶ cm/dyne at 100 Hz
Weight 8.8 g
Stylus Lyra long-footprint variable-radius line contact, nude diamond (3 × 70 µm), slot-mounted
Cantilever Solid boron rod, short one-point wire suspension
Frequency range 10 Hz – 50 kHz
Body One-piece machined 7075 aluminum, threaded mounting holes (2.6 mm)
Recommended tonearm Medium to medium-high mass
Also available Kleos (stereo, 0.5 mV) and Kleos SL (stereo, 0.25 mV)

Lyra Kleos product page and specifications

Rebuilds and trade-in

Lyra trade-in and exchange (MIBS Distro). Trade in any Lyra cartridge, in any condition, and the Kleos Mono is $3,935 instead of $4,995; trade in a worn Kleos Mono itself and the exchange price is $2,995. Lyra does not retip: a worn Lyra is replaced with a new one at these prices through MIBS Distro, Lyra's US distributor.

Trade in your Lyra Kleos Mono $2,995 after trade-in (credit $2,000)
Trade in your Lyra Delos $3,935 after trade-in (credit $1,060)
Trade in your Lyra Kleos $3,935 after trade-in (credit $1,060)
Trade in your Lyra Kleos SL $3,935 after trade-in (credit $1,060)
Trade in your Lyra Etna λ $3,935 after trade-in (credit $1,060)
Trade in your Lyra Etna λ SL $3,935 after trade-in (credit $1,060)
Trade in your Lyra Etna λ Mono $3,935 after trade-in (credit $1,060)
Trade in your Lyra Etna (original) $3,935 after trade-in (credit $1,060)
Other Lyra cartridges 20 more models qualify; use the trade-in selector on this page or ask us

Prices are MIBS Distro US retail, October 2025 list. The trade-in cartridge is sent to Lyra; a new cartridge is supplied, not a repair. Lyra Lambda (λ) models and the original versions trade in alike. Verified 2026-10-28. Source: Lyra USA & Canada price list, October 2025 (MIBS Distro).

Where it sits in the range

The Lyra cartridges Pearl Audio stocks, from least to most expensive:

Reviews

Plan your Lyra system with Pearl Audio

Pearl Audio is an authorized Lyra dealer. Arrange an audition in our Portland showroom, and ask us about Lyra's exchange and trade-in pricing. Call (503) 222-2599 or email sales@pearlaudio.com.

Signature technologies

The engineering behind the Lyra Kleos Mono Cartridge

Lyra gives its technologies names because each one solves a specific problem. Here is what each does, where it came from, why it matters in a system, and what you may hear.

No housing between stylus and headshellSince 2000

The direct-mounted cantilever and yokeless dual-magnet motor

Most moving-coil cartridges build a self-contained motor and then fit it into a housing. Lyra bolts the cantilever and coil assembly straight into the machined metal body, between two disc magnets with no iron yoke, so vibration drains directly from the stylus to the headshell and the magnetic field around the coils is the same from front and back. Lyra says it remains the only cartridge maker to build this way. Read the deep diveClose

What it does

In a conventional moving-coil the generator is an assembly of its own: an iron yoke carries flux from a magnet to the gap, the coils swing in that gap, and the whole unit is glued or potted inside a shell. Lyra's design dispenses with both the yoke and the shell. Two disc magnets of equal diameter sit in front of and behind the coils, so the field the coils move in is symmetrical, and the rear of the cantilever assembly is bolted, not glued, into the main structure of the body. The Helikon of 2000 introduced the arrangement, and the Titan of 2003 took it to its conclusion: a generator mounted directly to a one-piece body machined from titanium alloy, with the cantilever exposed under a transparent stylus guard. Jonathan Carr's stated principle is a direct energy path from stylus to tonearm, with no plastic in the way to interrupt it. Every current Lyra is built this way, from the Delos, whose solid boron rod is mounted directly into its aluminum body, to the Atlas λ Lambda, which keeps the yokeless dual-magnet system inside its titanium billet. The assemblies are built by hand in Tokyo by Yoshinori Mishima and Akiko Ishiyama.

Why it matters in a system

A cartridge is a very small vibration machine, and whatever energy the stylus puts into the cantilever has to go somewhere. Glue and plastic store it and give it back late; a bolted metal path hands it on to the headshell and the arm, where it can be dissipated. The equal magnets mean the coils see the same flux moving up as moving down, which keeps the signal linear. What is left is the groove rather than the housing.

What you may hear

Michael Fremer, reviewing the Titan in 2003, called it the least mechanical-sounding Lyra he had heard, and wrote later that even Lyra's critics agree the line's strongest suit is timbral neutrality: instruments with their own tone rather than the cartridge's.

Ogura-built, slot-mountedSince 2003

Diamond-coated boron cantilevers and the 3 by 70 micron line-contact stylus

The cantilever is a solid boron rod, coated with diamond on the Etna and Atlas, held on a very short one-point wire suspension and pressed into the body through a knife-edge mount. The stylus on the Kleos, Etna and Atlas is Lyra's own long-footprint line-contact shape, a nude diamond with a 3 micron minor radius and a 70 micron major radius, set into a slot in the cantilever rather than glued to a flat. Read the deep diveClose

What it does

Boron is among the stiffest materials that can be drawn into a rod, and a solid boron cantilever carries the stylus's motion to the coils with less flexing than aluminum. On the Titan of 2003 Lyra added a diamond coating to the boron, inside a metal jacket, and the diamond-coated rod has marked the top models since: the Atlas and Etna use it with a short one-point wire suspension mounted through a high-pressure knife-edge system. The Kleos uses the uncoated boron rod and coil system made by Ogura, and Lyra calls it the lowest-cost model to carry the full Ogura assembly; the Delos uses a solid boron rod of its own. The stylus on the Kleos, Etna and Atlas is a Lyra design, a variable-radius line-contact nude diamond of 3 by 70 microns whose long, narrow footprint rides a tall slice of the groove wall; it is slot-mounted, set into the cantilever rather than cemented to a flat. The Delos instead carries a Namiki microridge diamond of 2.5 by 75 microns, surface-mounted. Carr's reasons for the shape, as he explained them to Stereophile, were tracking, detail retrieval and reduced groove wear, and as early as 1996 he told Michael Fremer that the damper and the cantilever material have the single biggest effect on a cartridge's final sound.

Why it matters in a system

The stylus is the only part that touches the record, and the cantilever is the only path from it to the coils. A long, narrow contact patch reads the fine detail cut into the groove and spreads the tracking force over more diamond, which is why Lyra's styli are gentle on records at the same time as they are revealing. A stiffer cantilever keeps that detail intact on the way to the generator, and a slot-mounted diamond cannot rock on its mount.

What you may hear

Michael Fremer heard in the Delos ultra-fast, detailed and pristine transients and microdynamics beyond its price; Dennis Davis of The Audio Beat wrote that the Atlas "simply extracts more information and assembles it better than any cartridge I have heard."

Coils aligned while playing, not at restSince 2008

New Angle

In most moving-coils the coils sit square to the magnets when the cartridge is at rest, and go out of square the moment tracking force bends the cantilever. Lyra angles the coil former and shapes the dampers so that the coils are tilted at rest and come into alignment with the magnets only under the recommended tracking force, which is to say while a record is playing. Every current Lyra is a New Angle design. Read the deep diveClose

What it does

Tracking force deflects a cantilever by a small but real angle. A cartridge aligned on the bench, with no force on the stylus, therefore plays with its coils tilted relative to the magnets, and the flux through them is no longer symmetrical. Jonathan Carr's answer, first built into the Delos of 2008, was to pre-bias the generator: the coil former is set at an angle and the dampers are made asymmetric, tapered so that they hold the coils and core upright when the cartridge is at rest and deform into a symmetrical shape when the tracking force is applied. At that moment the magnetic circuit, the coils and the core line up, and because the geometry is now symmetrical, vertical and horizontal compliance become equal. The Delos was the first New Angle cartridge; the Kleos of 2010 followed with a dual neodymium disc magnet and coil system that, as Michael Fremer put it, produces symmetrical flux lines during play rather than at rest, and the Atlas of 2012 and Etna of 2013 were designed around the same principle. Lyra's product pages refer to the whole line since 2008 as New Angle models, and the λ Lambda suspension of 2020 is a refinement of the same idea.

Why it matters in a system

A generator that is only correct on the bench is wrong every time it plays. Aligning it under tracking force means the output is linear and the two channels behave alike through the whole excursion, which shows up as separation, tracking and a tonal balance that stays put as the cutting level rises. It also makes a Lyra less fussy about small variations in force and loading than its specifications might suggest.

What you may hear

SoundStage! explained that most cartridges' coils are no longer parallel to the magnets at 1.8 grams; Herb Reichert of Stereophile found the Delos "sounded like a fine-tuned supercartridge under a wide range of loading conditions."

Choosing the Lyra for the phono stageSince 2016

SL coils, Mono coils and loading

Each Lyra above the Delos comes in three windings. The standard version has two coil layers; the SL winds one, for half the output and a third of the impedance, and is meant for very high-gain, low-noise or current-input phono stages or a matched step-up transformer; the Mono winds two separate coils on a former parallel to the record, so it reads only lateral groove motion. Lyra publishes wide loading ranges and says they are to be finalized by listening. Read the deep diveClose

What it does

The Atlas SL and Etna SL arrived in 2016; the Kleos SL is built to order at a ten percent premium. One coil layer instead of two gives about 0.25 mV, impedances of 1.52 ohms on the Etna and Atlas SL and 2.7 ohms on the Kleos SL, and lower moving mass. Lyra's own advice is that the SL may offer extra pure and pristine sound but with less energy and power, that it is for expert users with very high-gain, low-noise phono stages or step-up transformers, and that the regular version is the one to choose if in doubt. The Mono versions wind two isolated coils on a square former lying parallel to the record rather than at 45 degrees, so they generate a signal only from horizontal stylus movement and ignore the vertical axis where mono-record noise lives; the coils can be run in parallel, singly, or in series for more output. Loading is specified as a range, 104 to 887 ohms for the Atlas, 95.3 to 816 for the Kleos, 97.6 to 806 for the Delos, with a transformer rating of 3 to 6 ohms for standard models and 1 to 3 ohms for SLs. Lyra's Erodion EVO step-up gives 26 dB of gain for 2 to 10 ohm cartridges and is named for the SL models.

Why it matters in a system

Jonathan Carr's explanation of loading is that the resistor mainly damps an ultrasonic resonance between the cartridge's inductance and the capacitance of the cable and phono input, so that the phono stage stays linear; he suggests phono stage input terminator is the more accurate term, and that minimizing capacitance first lets a wider range of values work. Which winding to buy therefore depends on the phono stage: a transimpedance input or a matched transformer rewards the SL, and most voltage-gain stages are happier with the standard coil.

What you may hear

Michael Fremer called the Atlas SL and Etna SL two of the world's great cartridges; Roy Gregory of The Audio Beat found that with most phono stages the standard Etna λ Lambda "simply sounded bigger, more confident and significantly more entertaining," and concluded there is no best Lyra, only the best Lyra for you.

All Lyra technologies and the company story

The Lyra story

Tokyo-built moving coils with the cantilever bolted straight into the body and coils that align while playing.

Founded 1991 in Tokyo, Japan; every cartridge still built by hand in Japan by Jonathan Carr (design), Yoshinori Mishima (manufacturing) and Stig Bjorge (business) · lyraanalog.com

Milestones

  1. 1986 Scan-Tech's first cartridge, the Tsurugi Jonathan Carr's moving-coil designs go into production in Tokyo under the Scan-Tech name, built in-house by Yoshinori Mishima, with Stig Bjorge running the business. The Tsurugi begins the line that leads through the Clavis and Helikon to the Kleos.
  2. 1991 The Lyra name Scan-Tech adds the Lyra brand for its own cartridges, the Lydian, Clavis and Parnassus, sold in the United States through Immedia of Berkeley, while building low-output moving coils for AudioQuest, Linn and Spectral.
  3. 2000 Helikon The Helikon replaces the Clavis D.C. with two equal disc magnets front and rear of the coils and a cantilever assembly bolted into the body, the method Lyra has used since. The Lyra Connoisseur phono stage and preamplifier, built with Petr Mares, go on sale in Japan the same year.
  4. 2003 Titan At $5,000 the Titan replaces the Parnassus D.C.t: a one-piece titanium-alloy body, a diamond-coated boron cantilever, the 3 by 70 micron line-contact stylus, and a generator mounted directly to the body, each one voiced by Mishima. The Titan i follows in 2006 and the Skala in 2007.
  5. 2008 Delos, the first New Angle cartridge Coils pre-angled to align with the magnets under tracking force rather than at rest. The Delos replaces the Argo and is still in the line, in Stereophile's Class B.Lyra Delos Cartridge
  6. 2010 Kleos The full Ogura boron cantilever and coil system in a nickel-plated duralumin body with two tuned damping cylinders; Michael Fremer calls it one of Carr's best efforts yet. The SL and Mono windings are built to order.Lyra Kleos Cartridge
  7. 2012 Atlas A new flagship at $9,500, carved from one titanium billet with asymmetric sides, nonparallel surfaces and a cross-shaped coil former. AudioQuest takes over US distribution; the single-layer Atlas SL follows in 2016.Lyra Atlas Lambda Cartridge
  8. 2013 Etna Shown at Munich in May and priced at $6,995, the Etna replaces the Titan i with a titanium core inside an asymmetric duralumin shell. The Etna SL of 2016 is the model Fremer called Carr's best work yet.Lyra Etna Lambda Cartridge
  9. 2020 The λ Lambda generation The Atlas and Etna families gain a suspension that splits the tapered damper into flat elastomer discs and a separate pillow. Stylus, cantilever and coils are unchanged; earlier Atlas and Etna cartridges can be rebuilt to Lambda specification.
  10. 2022 MIBS Distro In September, MIBS Distro of Gig Harbor, Washington becomes the exclusive US and Canadian distributor. Lyra's 2023 range is presented as the Lambda Collection with the Erodion EVO step-up; Stereophile's 2026 Recommended Components places the Atlas λ Lambda in Class A.
Read the Lyra story
Lyra

Lyra began in Tokyo as Scan-Tech, founded in the 1980s, which became Lyra. Jonathan Carr, American-born, a resident of Tokyo for more than thirty years and fluent in Japanese, started by making his own moving-coil cartridges; manufacturing was brought in-house under Yoshinori Mishima, a master craftsman who still oversees assembly, and Stig Bjorge, a Norwegian who had been Ortofon's Japanese distributor, took charge of the business. The first Scan-Tech cartridge, the Tsurugi, was launched in 1986. Through the late 1980s and 1990s Scan-Tech built low-output moving coils for other companies, among them AudioQuest, Linn and Spectral, while selling its own line under the Lyra name, which dates from 1991: the Lydian, the Clavis and the Parnassus, distributed in the United States by Immedia of Berkeley, California.

The Clavis Da Capo of 1996 showed the house method already in place: a Ceralloy cantilever, an Ogura line-contact stylus, a gold-plated iron core and coils of 99.9999 percent copper. The Lydian Beta of 1999 was the $995 entry model, with a nude body and a boron cantilever. The Helikon of 2000 replaced the Clavis D.C. and introduced the two equal disc magnets and the cantilever assembly bolted, not glued, into the body. Between 2000 and 2002 the company also built the Lyra Connoisseur phono stage and line preamplifier with Petr Mares, sold in Japan first and exported from late 2001. The Titan of 2003, at $5,000, replaced the Parnassus D.C.t with a one-piece titanium-alloy body, a diamond-coated boron cantilever and the 3 by 70 micron stylus, each one voiced by Mishima; the Titan i followed in 2006 and the Skala in 2007.

The Delos of 2008 was the first New Angle cartridge, its coils pre-angled to align with the magnets only under tracking force, and the principle has governed every Lyra since. The Kleos of 2010 brought the full Ogura boron cantilever and coil system to a duralumin body. In 2012 the Atlas, at $9,500, replaced the Titan i as the flagship, carved from a single titanium billet with no two surfaces parallel and the coils on a new cross-shaped former; by then AudioQuest of Irvine, California had taken over US distribution. The Etna, shown at Munich in May 2013 at $6,995, put a titanium core inside a duralumin shell and, in Stereophile's judgment, surpassed the Atlas in the midrange. The single-layer Atlas SL and Etna SL arrived in 2016, at $12,995 and $9,995, and Fremer called the Etna SL Carr's best work yet.

In the spring of 2020 the Atlas and Etna families became the λ Lambda generation, with the tapered damper split into flat discs and a separate pillow; the Kleos and Delos continue unchanged. In September 2022 MIBS Distro of Gig Harbor, Washington, founded by Isaac Markowitz and Shane Buettner, became the exclusive distributor for the United States and Canada, and in 2023 Lyra presented its range as the Lambda Collection alongside the Erodion EVO step-up transformer. Lyra Co. Ltd. remains in Tokyo: Carr designs, Mishima does the final build and testing of every cartridge, and Akiko Ishiyama the preliminary build. Stereophile's 2026 Recommended Components lists the Atlas λ Lambda in Class A and the Delos in Class B, and SoundStage! Ultra gave the Kleos SL a Reviewers' Choice award in 2022. Pearl Audio carries the current range in Portland.

The complete Lyra story and technology library

Lyra at Pearl Audio

Pearl Audio is an authorized Lyra dealer in Portland, carrying the Delos, Kleos, Etna λ Lambda and Atlas λ Lambda, with the SL and Mono windings available to order through MIBS Distro, Lyra's distributor for the United States and Canada. Because the standard, SL and Mono versions suit different phono stages, we start with the phono stage and tonearm you own and recommend the winding to match, from a transformer or current-input stage for an SL to a conventional voltage-gain stage for the standard coil. We install and align the cartridge in your arm and set the loading by listening, as Lyra intends, and we can arrange the factory rebuild of an older Atlas or Etna to Lambda specification through the distributor.

Ownership

Rebuilds, exchange and trade-in

Trade in any Lyra cartridge, in any condition, and the Kleos Mono is $3,935 instead of $4,995; trade in a worn Kleos Mono itself and the exchange price is $2,995. Lyra does not retip: a worn Lyra is replaced with a new one at these prices through MIBS Distro, Lyra's US distributor.

Lyra trade-in and exchange (MIBS Distro)

Trade-in credit
—
Your price after trade-in
$4,995

Eligible: any Lyra cartridge, any condition; exchange price when the trade-in is the same model, upgrade price when it is a different model (Atlas: top-tier price for Atlas, Etna, Olympos, Parnassus or Titan trade-ins). Prices are MIBS Distro US retail, October 2025 list. The trade-in cartridge is sent to Lyra; a new cartridge is supplied, not a repair. Lyra Lambda (λ) models and the original versions trade in alike. Verified 2026-10-28.

Ask us about this trade-in

Pricing per Lyra - 2025 - Dealer Pricelist (MIBS) (MIBS Distro, effective October 2025). Programs are set by the manufacturer and may change.

The Pearl Audio experience

How we work with you

A system at this level should be heard, thoughtfully matched, and properly set up. From the first audition to long-term ownership, you work with the same people, in person.

  1. 01

    Listen first

    The Kleos Mono Cartridge is not in our rooms at present. When it is the right piece for a client we arrange a demonstration unit from the manufacturer and set it up for a private session.

  2. 02

    Delivery and installation

    We deliver and install throughout the Portland area, taking care of placement, connections, ventilation and system configuration ourselves.

  3. 03

    Support for as long as you own it

    We support everything we sell for as long as you own it, whether the answer comes by phone, in your home, or through factory service.

  4. 04

    A path for what comes next

    Trade-in assistance and qualifying 100% Trade-Up options give you flexibility when your listening priorities or your system change.

Ask about hearing this

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