What is the best way to reduce speaker cabinet volume

[454Casull]

That gives me an idea - hiding a still in a speaker...

[BHTX]

Originally posted by pjpoes
over dampened typically means that the cabinet is smaller and thus the Q is higher. I think there is a lot of confusing information out there about this, which I can only guess comes from old vs new design. Many designers will call .5 critically dampened, some even go so far as to say .7 is critically dampened. They refer to this as high Q, and over dampened, then say that 1 or higher is very high Q and very over dampened.

Actually, there's a lot of confusing information in your own posts, rather than just other people's.

.707 is usually good compromise, altho slightly lower often tends to work best in a typical listening room. Somewhere around .577 is also sometimes considered. .5 is critically damped. Under .5 is over damped. Anything much over .7 I usually refer to as over damped.

andy2, nice wood floor btw.

[stoolpigeon]

Damping and Q or Quality factor have precise definitions.

My mother always told me that if I didn't know what I was talking about I should keep my mouth shut.

Unfortunately she was pre internet.

sp

[breez]

It seems to me that when a room and loudspeaker are considered as one system the differences between 0.5 and 0.707 Q are miniscule. Ever do a measurement of a typical listening room in the modal region? I can guarantee you will find several resonances with very high Q.

[richie00boy]

Sorry pjpoes you are wrong.

Over damped means the response to a square wave shows rounded corners, which is what happens when the box is made big (assuming Qts<0.5). The amplitude response will also be droopy.

Under damped means the response to a square wave begins to ripple, which is what happens when the box is made small. The amplitude response can be anything from showing a peak, through maximally flat, to just a tiny bit of droop.

Critically damped is and has always been Q=0.5, this is as good a perfect rendition of a square wave as you will get.
Under damped means some ripple of the square wave. With Q=0.707 although the amplitude response is maximally flat the square wave response shows a little peaking, it's slightly under damped.

[Conrad Hoffman]

Right, flat response and critical damping don't occur at the same Q. All logical arguments aside, I've never liked sealed systems with the typical Q, but think they sound better up around 0.9- and I'm not a fan of thumpy bass. IMO, the best bet might be a Q around .5, but with equalization to correct the drooping response- assuming one has the power and the speaker can handle it.

[sreten]

Hi,

Line level EQ is another option, it always works,
it never fails to improve matters to some degree.

/sreten.