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Understanding Loudspeaker Data | Eminence Speaker
https://www.eminence.com/support/understanding-loudspeaker-data/
As a general guideline, Qts of 0.4 or below indicates a transducer well suited to a vented enclosure. Qts between 0.4 and 0.7 indicates suitability for a sealed enclosure. Qts of 0.7 or above indicates suitability for free-air or infinite baffle applications. However, there are exceptions! The Eminence Kilomax 18 has a Qts of 0.56.
Speaker Box Calculations - Basic Car Audio Electronics
http://www.bcae1.com/spboxad2.htm
Vas: Vas is the volume of air that has the same compliance as the speaker's suspension. Stiff speakers have lower Vas and tend to use small enclosures. Speakers with loose suspension have a higher Vas and use larger enclosures. Qes: Qes is the electrical Q of the speaker and only takes the electrical properties into consideration. Qms:
Vas vs. Qtc? - Techtalk Speaker Building, Audio, Video ...
https://techtalk.parts-express.com/forum/tech-talk-forum/35893-vas-vs-qtc
For example, say you have a woofer with Vas = 51.8 liters, Fs = 35.8 Hz, and Qts = 0.39. Then you put it in a sealed box with Vb = 37.5 liters. Qtc = (0.39) x sqrt [ (51.8/37.5) + 1] = 0.60 and Fc = (35.8) x sqrt [ (51.8/37.5) + 1] = 55.2 Hz That's for a sealed box. A vented box is more complicated, and there are no simple formulas for them.
Measuring Loudspeaker Driver Parameters
https://www.sound-au.com/tsp.htm
Vas Question - diyAudio
https://www.diyaudio.com/community/threads/vas-question.176198/
Vas is simply the the equivalent box volume of the drivers suspension. If the driver is put in a sealed Vas box, Fs goes to Fbox and Qts goes to Qbox by multiply by 1.414 (root 2). In a sealed 1/3 Vas box, Fbox and Qbox are double Fs and Qts. e.g. a driver Fs=30Hz, Vas=30L, Qts=0.35 : in a sealed 10L box Qts=0.7
Understanding Fs and Qts - Subwoofers / Enclosures - #1 ...
https://www.stevemeadedesigns.com/board/topic/121348-understanding-fs-and-qts/
Qts is the "overall Q" of the speaker, and is something that dictates motor force and what kind of enclosure a speaker should be in. Low Qts woofers (say .35 and down) should be in a ported alignment only. Mid Qts woofers (say .36 to . …
Relation between Vas and Enclosure volume | diyAudio
https://www.diyaudio.com/community/threads/relation-between-vas-and-enclosure-volume.26085/
The famous audio writer David Weems tried this out. He took a speaker with the Qts of 0.6, put it in a box over 2 times Vas, and pronounced the distortion too high to be useful. Thiele-Small were being generous when they put their last useful alignment at Qts=0.57.
Speaker Qts and cabinet size | The Gear Page
https://www.thegearpage.net/board/index.php?threads/speaker-qts-and-cabinet-size.966154/
1) No, the Qts is a measure of an individual speaker's resonance. This doesn't change with cabinet loading, so each speaker will perform according to its own specs. Very much like when you play a chord, each string maintains it's pitch, but what you hear is …
Vas vs Box Volume - Techtalk Speaker Building, Audio ...
https://techtalk.parts-express.com/forum/tech-talk-forum/40278-vas-vs-box-volume
Vas, Fs, and Qts. Select the box volume, Vb (use same units for Vb that you use for Vas) alpha = Vas/Vb then, Qtc = Qts * sqrt [ (alpha^2) + 1] and Fc = Fs * sqrt [ (alpha^2) + 1] A target for Qtc is often between 0.65 and .90. Most often, the "optimally flat" value for Qtc is 0.71.
Xmax, Qts, Qes, Qms? Whats all this mean? | Car Audio ...
https://www.caraudio.com/threads/xmax-qts-qes-qms-whats-all-this-mean.269273/
Qms: The Q of a speaker at its free air resonance, considering only its mechanical losses. Qtc: The total Q of a woofer and sealed enclosure (Fc) at the system's resonance frequency, considering ALL resistive losses. Qts: The total Q of a woofer at Fs, considering all driver (speaker) resistances. Vas: Volume Acoustic Suspension.
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