MoFi Electronics Super HeavyWeight Noise Dissipation Record Weight

367 Grams of Billet Aluminum Wrapped Around a Polymer Damper

The MoFi Super HeavyWeight is sold each, one per turntable. It weighs 367.4 grams — 13 ounces — and drops over a plain spindle with nothing to thread or tighten. The shell is billet-machined 6061 aluminum; the working part is a polymer core underneath it.

Mass alone couples a record to the platter. What the polymer adds is somewhere for the energy to go once it is coupled, rather than bouncing back into the vinyl. MoFi developed the material with Mike Latvis of Harmonic Resolution Systems, who builds isolation for a living.

A Polymer Core, an Aluminum Shell, and a Soft Underside

Fit, Load and Materials

The weight is 367.4 grams, adding 0.81 pounds to the platter bearing, and measures 3.0 inches across by 1.355 inches tall. MoFi calls that figure the optimum weight for applying no strain to a turntable's motor, bearing or suspension.

The outer shell is billet-machined 6061 aluminum, which gives you something to grip. Underneath is the HRS polymer, chosen for absorbing noise rather than adding stiffness, and the face that meets the record is soft polymer so it will not mark a label.

The bore is unthreaded, so it lowers onto a plain spindle and works on any make of turntable, not only MoFi's own. On a sprung or lightweight deck, check what the maker allows before adding weight to the platter — a suspension is tuned around a known mass, and this adds to it.

Who Is the Super HeavyWeight Best For?

• You want damping as well as coupling — the polymer core absorbs energy instead of reflecting it back into the record
• Your turntable has a plain spindle — nothing threads, nothing tightens, and no make of deck is excluded by the fitting
• You handle records with cold hands — the billet aluminum shell is machined to be gripped, not balanced on a fingertip
• You worry about your labels — the underside is soft polymer, not metal
• Your turntable is sprung or has a light platter — 0.81 pounds changes how a suspension sits, so check what your maker allows and compare the lighter options in record clamps and weights

How Do You Use It?

Set the record on the platter and let it settle. Hold the weight by its machined edge, line the bore up with the spindle and lower it until the polymer face meets the label. Let go — the mass is the mechanism, and pressing adds nothing. Lift it straight up before turning the record over.

Pairs Well With

What most Super HeavyWeight owners shop next.

• Turntable mats — the weight presses the record onto whatever is underneath it
• Record cleaning machines — the biggest single change available to a used collection
• Stylus force gauges — the other measurement that decides how a record tracks
• Record brushes — a dry sweep each side, with the record held flat

Frequently Asked Questions

How many do I need?

One. The Super HeavyWeight is sold each and a turntable takes a single weight.

Will it fit my turntable?

The bore is unthreaded, so it lowers onto any plain spindle regardless of make. MoFi built it for all turntables, not only its own.

Is 367 grams the right amount?

MoFi settled on it as the optimum figure for applying no strain to a motor, bearing or suspension. For a mid-to-high-mass platter of roughly 5 pounds and up, MoFi builds the heavier Super HeavyWeight Champion.

What is the polymer underneath?

A proprietary material developed with Mike Latvis of Harmonic Resolution Systems, chosen for absorbing noise. It also forms the soft face that meets the record label.

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