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.

128x128yogiboy

@flyerguru

I would like to thank you and all the others that explained what Q means! I have never seen it prior to looking at the Falcon Q7 that I just ordered!

Sorry about bringin this up after a year or more.

Question regarding Q and the mass of a passive radiator.

I have two sets of very large floorstanding full-range speakers, VMPS Super Tower and Super Tower III, designed by the late Brian Cheney.

Each speaker uses a 15" downward-firing passive radiator. Morite putty is attached to the PR, and the end user is supposed to add or remove it to achieve the desired bass response.

I desire a low Q, tighter, flatter response. Generally speaking, would this mean more putty to increase mass or less putty to reduce mass? The instructions discuss what to listen for, but I'm interested in the more theoretical explanation.

@davidc1 

Questions like this are usually best asked at DIYaudio, but I think this refers to the Qtc.  Q is unfortunately an overloaded term in speaker and filter design.

The charts here will probably help.