Michell Engineering Record clamp (standard spindles ≥ 6.5 mm)
Overview
The Record Clamp from Michell Engineering embodies an elegant technical solution for optimizing vinyl playback. Designed by John Michell, the very inventor of the record clamp concept in the 1960s, this accessory combines mechanical simplicity with acoustic efficiency. Its construction pairs a black Delrin body with an anodized aluminum tightening knob, available in silver or black to suit individual aesthetic preferences.
A collet-chuck clamping mechanism, a hallmark of Michell innovation
The Record Clamp fundamentally differs from traditional clamps through its ingenious collet-based fastening system. This technology, directly inspired by precision lathe chucks, operates on a sophisticated mechanical principle: a split aluminum collet tightens around the turntable spindle when the user turns the top knob. This motion draws the collet into the clamp’s conical body, producing uniform radial compression that ensures a firm grip on the spindle while simultaneously applying downward pressure on the record.
This approach is radically different from screw-on clamps that require a specific threaded spindle, or simple weights that rely solely on mass to hold the record. The collet system enables universal attachment to any smooth spindle, without modifying the turntable. A Teflon washer, positioned between the knob and the clamp body, ensures smooth rotation during tightening and prevents the body from turning with the knob, thus preserving the record’s precise positioning on the platter.
Delrin: a technical material with remarkable acoustic properties
The choice of Delrin for the Record Clamp’s body reflects a deep understanding of acoustic considerations. This acetal homopolymer, developed by DuPont under the trade name Delrin (or polyoxymethylene POM), has mechanical characteristics particularly well-suited to audiophile use. Its intermediate density provides enough mass to ensure effective coupling with the record, while remaining considerably lighter than traditional metal clamps—around 70 grams in total for the Record Clamp.
This carefully controlled lightness protects the turntable’s bearings, which is especially crucial for suspended designs where excessive mass could compromise the suspension’s balance. Delrin shares resonance properties with vinyl, creating an acoustically compatible interface that promotes the transfer of parasitic vibrations from the record to the platter, where they are dissipated. Unlike metallic materials that can introduce their own tonal coloration, Delrin remains acoustically neutral, preserving the original sonic signature of the recording.
Two versions for universal compatibility
Michell Engineering demonstrates meticulous attention to detail by offering two variants of the Record Clamp, each optimized for specific spindle configurations. The standard version fits straight spindles with a minimum height of 6.5 mm above the record, a common setup on Michell GyroDec and TecnoDec turntables, as well as many modern Thorens, Pro-Ject, and EAT models. This version ensures optimal collet grip on the straight section of the spindle, providing stable and repeatable clamping.
The “R” version, identifiable by a specific marking, addresses the dimensional constraints of Rega turntables and older Thorens models, whose shorter spindles measure between 5 mm and 6.4 mm in height. The depth of the central recess has been specifically adjusted to accommodate these shorter spindles while maintaining the clamping mechanism’s effectiveness. Far from being anecdotal, this technical distinction reflects a deep knowledge of dimensional variations among manufacturers and ensures broad compatibility without compromising performance.
Technical Specifications
Main Features
- Evens out unwanted vinyl warps
- Reduces record resonances for more precise sound
- Optimal vinyl stabilization during playback
Material Specifications
- Body: black Delrin
- Knob: anodized aluminum
- Robust, durable design
Compatibility
- Standard mounting: for straight spindles of 6.5 mm or larger
- Compatible with: Michell GyroDec, TecnoDec, modern Thorens, Pro-Ject, EAT
General Information
- Color options: silver or black anodized knob
- Universal use on all turntables with compatible spindles
- Function: vinyl stabilization and resonance reduction
Frequently Asked Questions
Is the Record Clamp compatible with my suspended turntable?
Weighing approximately 70 grams, the Record Clamp is perfectly suitable for suspended turntables. Its collet clamping system exerts no additional axial force on the spindle, unlike screw-on clamps, thus preserving the delicate balance of suspension systems.
How do I choose between the standard version and the “R” version?
Accurately measure the available straight spindle height above the record. If this height is less than 6.5 mm, choose the “R” version. Owners of Rega turntables or older Thorens models should generally choose the “R” version, while Michell, modern Thorens, Pro-Ject, and EAT turntables typically use the standard version.
Can the clamping damage my turntable’s spindle?
The aluminum collet distributes pressure evenly around the spindle’s entire circumference, avoiding localized stress points. The mechanism is designed to apply sufficient pressure without deformation, and thousands of users since the 1970s confirm the absence of damage to their spindles.
What acoustic difference can I expect?
Users typically report improved low-end definition, a more stable soundstage, and a notable reduction in inner-groove distortion. As parasitic vinyl resonances are better drained into the platter, the musical signal gains in clarity and precision.
How should I use the supplied felt washer?
Place the washer under the center label only for records that are concave. For flat or convex records, use the Record Clamp directly without the washer. The goal is always to achieve maximum contact between the record and the platter.
Can the Record Clamp completely fix a severely warped record?
While the Record Clamp significantly improves the flatness of slightly warped records, it cannot perform miracles on vinyl with severe deformation. For such extreme cases, specialized solutions like controlled heating systems are still necessary.
Can I leave the Record Clamp on my turntable permanently?
While technically possible, it is recommended to remove the Record Clamp after each listening session to avoid any permanent load on the bearings and preserve your turntable’s longevity.
- Eco-contribution included in the sale price.
