EVPs – the most effective, easiest and least expensive means of controlling unwanted vibrations.
Equipment Vibration Protectors (EVP) are lab-proven vibration isolation feet for high fidelity playback and recording equipment, as well as guitar, bass and keyboard cabinets, microphone stands, etc. EVPs allow equipment to perform optimally, quiet the room, and prevent vibrations from being transmitted to adjoining spaces. Vibrations and resonances are no longer heard, leaving only the pure original loudspeaker signals.
EVPs de-couple vibration transmission. They do so by transforming the mechanical energy into heat energy.
Improves Sound Quality
Clarity, Dynamics, Timbre and Soundstage are improved because resonances and vibrations are eliminated from both the electronics and the structure.
Reduces Sound Transmission
Vibrations are not transferred to the building structure.
Found to conservatively eliminate vibrations to and from equipment from 5 Hz. and above, by >80%.
Different Sizes for Different Jobs
Too little or too much deflection will not decouple energy transfer. EVPs come in 2 sizes and 3 densities to “float” the weight of your equipment properly.
AV RoomService EVPs (Equipment Vibration Protectors): Outstanding Equipment Isolation for Systems at Any Price Point
09-01-2018 | By Tom Gibbs | Issue 99
“When AV RoomService’s specially-designed and constructed EVP isolators arrived, I replaced the wood blocks under the Dynaudio MP5 monitors and the difference was “night and day”: The sound not only tightened up, but it became quieter. I highly recommend EVPs. They are the real deal. Norman is the real deal. Everything he designs is based on science, there is no voodoo here, and this science has served to truly improve my sound.”
3 time Grammy winner
(EVPs shown under microphone stand)
winner of 10 Grammy Awards
“I’ve been happily using prototypes of the EVPs for almost a year. Since placing them under my guitar cabinet, they have not moved. I found the improvement in tone to be readily apparent – a tightening up in the low end and a more focused and clearer tone overall. I won’t record my guitar without them!”
guitarist of King Never
Wow…I am speechless. This is not a placebo effect, I know my room and monitoring very well and this is the BEST upgrade I did so far. Tighter bass and the stereo imaging is much more precise and the center is SPOT ON! Your product is simply the BEST. I have tried 3 or 4 different decoupling products in the last 20 years (and not cheap $) but the EVP’s are astonishing! Wonderful! Thank you!”
All the best,
Trillium Sound Mastering
EVPs are vibration isolation feet for high fidelity playback and recording equipment, as well as guitar, bass and keyboard cabinets, microphone stands, etc. EVPs allow equipment to perform optimally, quiet the room, and prevent vibrations from being transmitted to adjoining spaces. Vibrations and resonances are no longer heard, leaving only the pure original signals.
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Improves Sound Quality (clarity, dynamics, timbre and soundstage) because resonances and vibrations are eliminated. Floors, walls, ceilings, and furnishings cause unwanted resonances and vibrations to be re-radiated into the room. Vibrations can even cause sonic degradation in electronic components, their connections, laser reading and turntable playback, resulting in data corruption, phase distortions, noise, etc.
Microphony occurs when electrical components receive mechanical energy and convert it into electrical energy, thus distorting the signal. Tubes and phono cartridges are especially susceptible. Crystal oscillators in digital products can be effected by vibrations by changing their frequency slightly, causing timing errors. Turntables are certainly the most sensitive to vibrations, amplifying them over the speakers, sometimes even to the point of feedback. They are also most sensitive to footfalls being picked up and amplified, and even mistracking.
Improves Noise Control by reducing Sound Transmission to adjacent spaces other occupants are not annoyed, because vibrations are not transferred to the building structure.
EVPs have been lab tested and found to conservatively eliminate vibrations to and from equipment from about 5 Hz. and up, by >80%. This is done by converting the mechanical energy into thermal energy. The result is audible from both a sound quality and a noise control point of view.
Standard EVPs are 2″ or 4″ squares by about 1″ tall (approx. 51 or 102 square x 30mm tall). Standard EVPs are black with felt or rubber top and bottom. Standard EVPs typically ship within 1-2 business days of ordering.
EVPs decouple and “float” resting equipment, while absorbing vibration energy. A proper decoupler must be able to handle the load without compressing too little, or too much, in order to function. EVPs are available in two densities and two sizes to handle equipment from 6 – 304 lbs. (7.25 – 137.89kg.). They are about 1″ (25.4mm) tall and either 2″ (50.8mm) or 4″ (101.6mm) square, with rubber or felt finish. Custom size and/or density EVPs can be specially made.
Spikes, blocks and cones are very popular and can remove some vibrations– while amplifying others. They actually couple vibrations to whatever they are touching. Think of a tuning fork handle placed against a shelf. The shelf becomes a soundboard. Rubber type pads are limited in bandwidth and in load handling. They too can alter the sound, but not eliminate the problem. Decoupling is the correct solution to preventing vibration transmission and removing resonances.
In addition, solid feet offer little to no noise control, rather they transfer vibrations directly into the structure and to adjacent spaces by coupling them. This structure-borne energy is not only transferred to connected spaces, but also re-radiated back into the room.The videos below demonstrate the EVP effectiveness in an easy-to-understand manor. It also demonstrates how solid feet do not isolate vibrations, rather they directly couple them, attenuating some frequencies while amplifying others, depending on the unique compliance of the whole system. The mechanically plucked tines offer a controlled, repeatable demonstration.
For reference: The sound level on the glass peaked at 80.3 dBA @15kHz. The sound level on the cone peaked at 82.2 dBA @ 13.5kHz. The sound level on the EVP peaked at 45.5 dBA @ 1.1kHz. Be suspect of claims with no proof, and of “one-size-fits-all” isolators.
EVP – Test 1
EVP – Test 2
note: “NoVibe” shown in the videos was the project name during development. Once the product moved to production status, the name was changed to “EVP”.