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q factor?

Old 11-21-2004, 09:00 AM
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go5
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what is it? is it better to have a low q or high?
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Old 11-21-2004, 10:33 AM
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in the driver paremeters for a sealed enclosure a .66 sizes gives a q factor of 0.707 a 1 ft sixe gives a q factor of 0.589. What is a q factor?
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Old 11-21-2004, 10:36 AM
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the menu:

Qts

Qes

Qms

or Box alignment Q (used for decribing sealed box low frequency characteristics)
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Old 11-21-2004, 10:37 AM
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i would think that he is refering to the q of the box
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Old 11-21-2004, 10:43 AM
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just missed your post... [img]tongue.gif[/img]

Ok, what you are looking at is a value for comparing the driver's resopnse before rolling off.

A value of 0.707 is considered perfectly flat frequency response wise with a 12db/oct low freq. roll off rate.

A value of 0.59 is going to have a less pronounced low frequency roll off (it will sound deeper) but will have less midbass punch to it.

A value of 1.0 is widely popular in car audio due to it's enherent punch or boost in the midbasss region. This gives a stronger amount of kick on music transients, but less low end extension.
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Old 11-21-2004, 10:48 AM
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so a choice between the two if you had it would be the .707? Sorry still trying to understand
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Old 11-21-2004, 10:55 AM
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There is cabin gain to consider here as well.
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Old 11-21-2004, 11:17 AM
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What PEI describes is a side effect of box Q, IMO..

The total Q for your woofer system describes the compliance of the driver in the box...

A higher Q will have better transient response... (better accuracy, 'tighter' sound) a lower Q will give you a sloppy boomy sound...

As PEI mentioned, this is directly related to the frequency response of the box with a given woofer as well...

If I were you I'd stick with .707 [img]graemlins/thumb.gif[/img]

[ November 22, 2004, 06:36 AM: Message edited by: Haunz ]
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Old 11-21-2004, 11:36 AM
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Originally posted by Haunz:

The total Q for your woofer in a box describes the compliance of the driver...

A higher Q will have better transient response... (better accuracy, 'tighter' sound) a lower Q will give you a sloppy boomy sound...

I thought it was the other way around.

[ November 21, 2004, 12:42 PM: Message edited by: Seahag ]
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