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Fs. This parameter is the free-air resonant frequency of a speaker. Simply stated, 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.
Can a speaker play below its FS?
But as a general rule, pretty much every single subwoofer plays below Fs. And the Fs (driver resonant frequency) becomes Fc (system (driver + enclosure) resonant frequency) when placing the driver in a sealed enclosure.
What should subwoofer low pass be set to?
As a general rule, the Low-Pass Filter should be set at a value approximately equal to (or below) 70% of your main speaker's lowest frequency response. For example, your speaker's frequency response goes down to 43Hz. 70% of 43Hz equals 30.1, so you should set the subwoofer's low pass filter to 30Hz.
How do you find the FS of a speaker?
The Fs of the speaker in free air has been measured, so simply add a suitable mass to the cone and re-measure the resonant frequency. This becomes Fs¹. First, measure cone diameter so that effective cone area can be determined. Measure the diameter, including half the surround.
What are the best settings for a subwoofer?
Tips for Setting the Proper Crossover Frequency of a Subwoofer
- On-wall or Tiny 'satellite' speakers: 150-200 Hz.
- Small center, surround, bookshelf: 100-120 Hz.
- Mid-size center, surround, bookshelf: 80-100 Hz.
- Large center, surround and bookshelf: 60-80 Hz.
- Very large center, surround, bookshelf: 40-60 Hz.
What is subwoofer resonant frequency?
Every port has what is called a resonance frequency, which is the frequency at which it vibrates and is mainly due to the port's length and width. It's the sound waves at the resonance frequency, or the ones that are close to it, that will be boosted by the port.
What is QMS on a subwoofer?
Qms: This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including mechanical losses. Also called the mechanical damping of the subwoofer. This unitless measurement usually varies from 0.5 – 10.
What does a crossover do?
A crossover serves as a filter that blocks out unwanted frequencies to a speaker or group of speakers. This is extremely useful because it allows us to specifically send each speaker the group of frequencies that it will play most efficiently and effectively.
What phase should I set my subwoofer?
in-phase One of the other controls you may find on your subwoofer's rear panel is marked "phase." It's provided because the speakers and subwoofer sound best when they are in-phase — meaning their woofers move in and out in sync with each other.