How do I know the best speaker for an enclosure?

[dohhhhh6]

I'm planning on building (just as this point) a subwoofer for my car and I'm doing some research into making one.

I'm a bit confused on a subject. I heard that there's multiple enclosure designs and there's a few set "golden" equations, however, as long as I follow one of those equations, with a sealed cab, will the speaker need to be matched with the enclosure (as long as it's a sealed cab oriented sub speaker).

I know that with ports you need to have the cab set for a freq that works with the speaker and whatnot, but do you have to do that with a sealed enclosure?

Thanks!

 

[Vikash]

Yes. First you pick the driver (normally) then you design an enclosure (sealed in your example) of the correct volume required for that driver.

The only golden that I've heard of is a ratio. And it's not applicable when designing subs

 

[Bill Fitzpatrick]

Sort of. There is no correct enclosure size for a sealed woofer until you decide what you want the Q to be. You probably don't want the Q to be less than .5 nor more than 1. I prefer .7 or lower.

You should ask the woofer vendor for recommended enclosure sizes. You will probably find this info on their web site.