What is qms subwoofer

In the simplest terms possible, the sub handles the lower ranges of sound. Audiophiles will quickly tell you that any great audio setup needs a subwoofer to handle the deeper sounds, while a tweeter will handle the higher pitched sounds, and a mid-range driver to handle anything in-between. These three together deliver all the sound range that is capable of being heard by the human ear.

Now, a subwoofer has a resonant frequency due to the nature of the equipment found inside the speaker. Now that we have a working knowledge of frequencies, the Qms comes into play. There is a tendency of the speaker to operate at the resonant frequency, so knowing this value allows you to make a more intelligent purchasing decision by selecting the speaker that has the highest Qms.

The time now is PM. Resources saved on this page: MySQL User Name. Stay logged in? Mark Forums Read. Please consider donating to help us continue to serve you. Page 1 of 5. Last ». Thread Tools. Woofer with high Qms I have a woofer with a Qms of View Public Profile.

Send a private message to Bill Fitzpatrick. Find More Posts by Bill Fitzpatrick. Send a private message to richie00boy. Visit BillFitzmaurice's homepage! Send a private message to Ron E. Find More Posts by Ron E. Send a private message to madinoz. Find More Posts by madinoz. Later, in the 80's, manufacturers started to add more mass, they added more damping, and they made surrounds with high loss.

That gave an extremely flat frequency response, but also a lot of energy storage. This compared, the old drivers were much quicker. They had some resonances, but you could get rid of that in the crossover. It was this run for flat response that gave a lot of modern drivers this dull, uninteresting sound.

And you can also measure higher second and third harmonic distortion in some of them. Qms is a measure of the driver's tendency to resonate at Fs, based on its mechanical characteristics, e. Total Q of the driver at Fs.

Qts is a measure of the driver's tendency to resonate at Fs, based on its overall characteristics. DC resistance of the driver's voice coil. Re is less than the driver's rated impedance normally 4 or 8 ohms.

Effective surface area of the driver. Excursion limit due to the magnetic limitations of the driver's motor. Maximum physical excursion capability of the driver. Exceeding Xmech normally results in damage to the driver. Excursion limit due to the driver's suspension. Linear one-way travel of the cone.