Linn Koil Moving Coil Cartridge

Linn Koil Moving Coil Cartridge

The Koil is Linn's entry point into moving coil cartridge performance — fitted as standard to the LP12 Majik MC and the first step onto a cartridge ladder that extends through the Krystal and Kendo to the Ekstatik at the summit. Entry point in Linn's moving coil range is not entry level by any wider measure. The Koil uses a nude Microlinear stylus, a boron cantilever, and a trapezoidal armature — material and engineering choices that place it measurably ahead of most moving magnet alternatives in resolution, dynamic response, and inner detail, and that reflect Linn's consistent position that the correct engineering for the job is the correct engineering at every level of the range, without compromise made on grounds of price.

Moving Coil — Why the Topology Matters

In a moving coil cartridge, very small, light coils are attached to the cantilever and move within a fixed magnetic field — the inverse of a moving magnet arrangement, where the magnet moves. The lower moving mass that results means faster, more precise stylus response: a more accurate transmission of groove modulations to the generator, with less inertia standing between the groove and the signal. The trade-off is lower output voltage, which places greater demands on the phono stage. At 0.4mV, the Koil requires a dedicated moving coil phono stage with appropriate gain, or a step-up transformer ahead of a moving magnet stage. A standard MM phono input will not provide sufficient gain for the Koil to perform correctly — this is the conversation to have before purchasing, not after.

Nude Microlinear Stylus — Precision at the Groove Wall

The Koil's stylus is nude — the diamond tip is a complete stone, not a chip bonded to a metal shank. A nude stylus tracks the groove with greater consistency and lower resonance than a bonded design: the diamond is doing all the work, without a compliance mismatch at the bond line introducing its own character into the signal. The Microlinear profile is a fine-line geometry that contacts the groove wall over a narrow, precise area — offering better high-frequency tracing and lower record wear than a standard elliptical, and closer in contact geometry to the lathe stylus that cut the groove originally.

Boron Cantilever — Stiffness Without Mass

Boron is one of the reference materials for high-performance cantilever design — stiffer than aluminium, lighter than most alternatives, with internal resonances that sit well above the audio band. A boron cantilever transmits groove modulations to the generator with minimal energy loss and without adding its own resonant character to the signal. It is not a material commonly found at the Koil's price point, and its presence here reflects the same philosophy that runs through the entire Linn cartridge range: the correct material is the correct material, regardless of where a product sits in the hierarchy.

Trapezoidal Armature — Linearity at the Generator

The armature geometry in a moving coil cartridge influences the linearity of the magnetic circuit — and by extension the distortion characteristics of the generated signal. The Koil uses a trapezoidal armature, a coil geometry that improves the linearity of flux coupling between the coils and the fixed magnets, reducing distortion in the generated signal. Combined with the low moving mass of the coil assembly, the result is a generator that is both accurate and clean at the signal levels a moving coil cartridge produces.

System Matching — Phono Stage Requirements

The Koil outputs 0.4mV at 5cm/s, with a recommended load resistance of 100Ω and a load capacitance of 1nF. These are not negotiable parameters: moving magnet phono stages — including the built-in phono inputs on many integrated amplifiers — do not have sufficient gain for the Koil to perform correctly. A dedicated MC phono stage at appropriate gain, or a step-up transformer ahead of an MM stage, is required. If your current system has an MM-only phono stage, this is the conversation to have before buying the Koil.

Tracking force is 1.8–2.2g, with 2.0g nominal. Cartridge mass is 7.6g — compatible with the Linn Krane Tonearm and other standard-mount Linn arms.

Technical Specifications

Who Is It For?

The Koil is for the LP12 Majik owner — or prospective owner — who has, or is committed to acquiring, a phono stage with proper MC capability. It is also the natural step for anyone running a Linn Adikt moving magnet cartridge who wants to move into moving coil performance without the more demanding system requirements of the Krystal above it in the range.

The nude stylus, boron cantilever, and trapezoidal armature are real engineering advantages — not badge distinctions. The Koil puts those advantages to work at a level of system investment that makes moving coil performance genuinely accessible for the first time on the LP12 platform. It is not the ceiling of what the LP12 is capable of — the Kendo, Krystal, and Ekstatik are all above it — but it is a properly engineered and convincing first step onto that path. If your phono stage is MM-only, the Linn Adikt is the right cartridge. The Koil is the right cartridge once you have — or are willing to add — appropriate MC gain.

For those building or developing an LP12 around the Koil, the Linn Karousel Bearing Kit is the most impactful single mechanical upgrade available to the platform, and the Linn LP12 Majik Turntable shows the Koil in its complete system context. The Linn Bedrok Plinth represents the plinth upgrade that gives every component above it — cartridge included — the most stable mechanical foundation from which to work.

Buying from Martins Hi-Fi

Martins Hi-Fi has been in Norwich since 1968. Elizabeth Gould runs the business today, and we stock only brands we have heard properly and stand behind.

We can advise on phono stage matching for the Koil — the right pairing matters at this level, and there is a meaningful range of MC phono stages worth considering at different price points. If you are fitting a Koil to an existing Linn LP12 Majik Turntable, we will set it up correctly — tracking force, azimuth, and stylus rake angle all set to the correct parameters before the deck leaves us.

When you get in touch, you'll be speaking with Dave and Chris — experienced specialists who can advise on this product and your whole system.

Contact us at info@martinshifi.co.uk, call 01603 627010, or WhatsApp on 07554 687137. You can read more about how we work on our Why Martins Hi-Fi page. We are at 85–91 Ber Street, Norwich, NR1 3EY.