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What does Q mean in speaker specifications?

I have never seen that listed before on any speaker. Can you explain what the Q means on these Falcon speakers? THX

 

 

Falcon Acoustics is pleased to announce the re-introduction of the Falcon Acoustics Q7 “Complete@Home” Loudspeaker system. Designed by Malcolm Jones and sold by Falcon for many years, the updated Q7 features the same Falcon B110 and T27 drive units as used in the Falcon LS3/5a in a specially extended LS3/5a-type cabinet to produce an optimum Q=0.7 system with extra bass compared to the LSA3/5a (+2dB @ 50 Hz). Factory built options supplied built by Falcon, fully checked and tested are available.

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Showing 2 responses by timlub

timlub
2,039 posts
 

QMS, QES, QTS, QTC

QMS tells us how well a speaker is damped in the mechanical realm or suspension

QES tells us how well a speaker is controlled through its electro-mechanical side, magnet & voice coil

QTS is a summary of the 2 combined.... QTS helps us easily judge if a driver belongs in a sealed or vented/ported box.

QTC is the final system Q after it is in the box.  .707 is considered a perfect rolloff.  .8 to .9 will give you a warmth or small rise in the lower region, Over 1.0 can get to be sizeable rise, but not necessarily, some drivers sound reasonably good with the rise in bass.  

Below the .707, its just the opposite of being above, the lower below it is, the leaner low frequency is.  I hope this helps in some way. Tim

timlub
2,039 posts
 

QTC is a function of the woofer completed in the box and really designed for a sealed box. A driver in itself has a QMS/QES = QTS and yes, you would be able to measure these on a horn driver.  

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