Driver free air resonance

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 · Hanatsu. When you put a speaker in a sealed box, the free air resonance (Fs) will instead be (Fsc), the resonance of the "system". The smaller enclosure you put it in the more the resonance will increase in frequency and you begin to lose low end extension.  · driver free-air resonance frequency (Hz) mechanical mass of driver diaphragm assembly including airload (gm) mechanical compliance of diver suspension () a reduction in Qts, given: and. Where: magnetic flux density in air gap (T) length of wire in air gap (m) mechanical mass of driver diaphragm assembly including airload (gm).  · The free-air resonance f(s) for the "Universal" AR 8-inch woofer, used in the AR and AR, is 25 Hz, +/- 10% or so. The system resonance for the AR is the same as the AR at 55 Hz. The surround will affect this number, of course, so if the woofer has been stiffened by the application of a thick or improper surround, the f(s) will go higher.

Driver free air resonance, in Hz. This is the point at which driver impedance is maximum. "This parameter is the free-air resonant frequency of a speaker. It is the point at which the weight of the moving parts of the speaker becomes balanced with the force of the speaker suspension when in motion. F s - Driver free air resonance [Hz]. Point at which driver impedance is maximum. F c - System resonance [Hz] (typically for sealed box systems). F b - Enclosure resonance [Hz] (typically for reflex systems). F 3 - -3 dB cutoff frequency [Hz]. V as - 'Equivalent volume of compliance' [L], measure of the free air 'stiffness' of the suspension. It represents the volume of air that has the same stiffness as the driver's suspension when acted on by a piston of the same area (Sd) as the cone. This is a key property of any driver and is determined by mass and compliance. This frequency represents the balance between the mass and force of the speaker suspension in motion. This property is known as the Fs of the driver / "free air resonant frequency" of the single speaker, or "fundamental resonance"; in this example of the Paradigm 4" midrange, it's around Hz and correlates with 0° electrical phase angle.

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