Nagra VFS / CLASSIC VFS - Nagra

Nagra VFS / CLASSIC VFS

VFS

Vibration Free System
The VFS and CLASSIC VFS (for AMP and for Source) both consist of two base plates, placed one above the other, designed to eliminate mechanical vibration causing noise in other elements of the system, in particular the highly sensitive preamplifiers. The VFS L is specifically reserved for use with the deeper chassis, like HD DAC, CLASSIC DAC, CLASSIC AMP and CLASSIC INT, as they are larger than the standard VFS plates.

VFS splitted

Vibration Free Support

The VFS and CLASSIC VFS (for AMP and for Source) is a system consisting of two solid aluminum plates, placed one above the other to eliminate external mechanical vibration. Vibration absorption is often underrated in hi-fi systems, and should be studied carefully so as to get the best out of the equipment. All electronic circuit boards inside Nagra equipment are mounted on special silencing-blocks anyway, but the VFS allows you to go one step further in truthful sound reproduction.

VFS detail

Features

Vibrations can be externally generated, caused by the acoustic waves of the music, transmitted through the ground (a nearby traffic for example) or even by mechanical playback of CD or LP.

The VFS uses  a technology developed for the space agency, consisting of a very special damping material that allows a dramatic vibration damping and shock absorption. Each half of the VFS uses a different cushion to absorb a specific range of mechanical frequencies, which is why the VFS consists of a double layer of plates, that must be used together.

Tube equipment is far more sensitive to vibration than solid state devices. This is why VFS are highly recommended on Nagra tube equipment.

Spikes

Spikes / feet

The VFS is delivered with three spikes or feet, which are screwed to the bottom of the unit to be placed on the VFS plates. Machined from ARCAp, a completely non-magnetic copper-nickel-zinc non-ferrous alloy. Their tips are made from Delrin resin whose properties lie between those of metal and plastic in terms of strength, hardness and stability. They ensure ultimate protection from vibration for any Nagra HiFi elements.

Tube equipment is far more sensitive to vibration than solid state devices. This is why VFS are highly recommended on Nagra tube equipment.

VPS on VFS

Technical specification

VFS

Top plate: 27.7 x 22.7 cm
Bottom plate: 28.6 x 23.7 cm/ 11.2 x 9.3 inches
Total height: 2.1 cm / 0.82 inches
Weight: 2.5 kg / 5.5 pounds

CLASSIC VFS

Top plate: 33.8 x 27.7 cm / 13.3 x 10.9 inches
Bottom plate: 34.8 x 28.7 cm / 13.7 x 11.3 inches
Total height: 2.1 cm / 0.82 inches
Weight: 4 kg / 8.8 pounds


MECHNANICAL SPECIFICATIONS VFS GEL

Optimum Load (kg/4 legs) – Top plate : 5〜15 – Bottom plate : 15〜50
Resonance Point (Hz) – Top plate : 26〜18 – Bottom plate : 22〜15
Resonance Magnification (dB) – Top plate : 13- Bottom plate : 20〜18
Recommended Frequency (Hz) – Top plate : 37〜 – Bottom plate : 30〜
Deflection (mm) – Top plate : 1.1〜2.2 – Bottom plate : 0.7〜2.0
Color – Top plate : Orange – Bottom plate : Blue
Review

The VFS is mentioned in reviews of other Nagra HiFi elements.

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