Speaker what is vas

Last edited: Oct 15, Maybe a variety of explanations might help? Vas is one of the trickiest parameters to measure because air pressure changes relative to humidity and temperature — a precisely controlled lab environment is essential.

Cms is measured in meters per Newton. Cms is the force exerted by the mechanical suspension of the speaker. It is simply a measurement of its stiffness. Considering stiffness Cms , in conjunction with the Q parameters gives rise to the kind of subjective decisions made by car manufacturers when tuning cars between comfort to carry the president and precision to go racing.

Think of the peaks and valleys of audio signals like a road surface then consider that the ideal speaker suspension is like car suspension that can traverse the rockiest terrain with race-car precision and sensitivity at the speed of a fighter plane. When you try to compress the air inside a box, you will encounter resistance. If the box is small, the air is harder to compress and therefore less compliant, and if the box is larger, the air is easier to compress, therefore more compliant.

In conclusion, Vas describes the volume of the air inside the cabinet, where the compliance of the speaker matches the compliance of the air inside the box. If you are making an acoustic suspension box , you can tell that the volume of the box will be something less than Vas.

The greater the rating, the lower the stiffness and larger recommended enclosure. It is measured in Liters. Trebdp83 Audioholic Samurai. Prob best not to focus on one TS parameter but to get an idea how they all interact with each other in the first instance as VAS alone does not determine a good speaker enclosure. So basically Elliot it has more to do with the lower frequencies being compromised.

Am I right to say if you always running subs under and crossing over anywhere between 95hz to hz, it shouldn't be a problem then. Focus on the frequency response chart offered by Faital Pro. Observe how flat the curve is from Hz to 2 kHz. Also observe at what frequency the high frequency roll off begins.

A driver with a 3 inch voice coil will be more suited for midrange as it usually offers a higher high frequency cutoff point than a driver with a larger voice coil. The Le determines the high frequency roll off point from a TS Parameters standpoint.

Smilies are On. Forum Rules. All times are GMT. The time now is PM. Resources saved on this page: MySQL User Name. Stay logged in? Mark Forums Read. Multi-Way Conventional loudspeakers with crossovers. Please consider donating to help us continue to serve you. Page 1 of 8. Last ». Thread Tools. Vas Question What does the Vas compliance measurement correlate to? View Public Profile. Send a private message to kabennett.

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Find More Posts by jamikl. Quote: Originally Posted by kabennett I just came across this on the Eminence website: "Vas represents the volume of air that when compressed to one cubic meter exerts the same force as the compliance Cms of the suspension in a particular speaker.