I have just started the install in my boot, and I was wondering if Porterd or sealed is better for SQ.

Thanks.
Dion.

Generally it will depend on what your sub is best suited to. A lot of ppl might tell you sealed boxes are better for SQ, but automotive subs generally struggle to play very deep in sealed boxes (assuming 12" or less). Having said that, sealed boxes usually give better control on the motion of the cone...

In my personal experience, I've had good setups with both, but my current setup (SQ) uses a large ported box for my two tens, and i believe it sounds better than the sealed boxes i had these subs in previously...

now im not a SQ guy .... with a stero pumping out ova 145 db .. you gotta make some sort of effot for your stero to sound good .. i'v had single 15's in ported and sealed and single 12's in seald and ported .. and 10's in a seald box .. out of al of them i would have to say i loved the 10's in a seald box the best ...that's went so hard and tight i loved it .. now running a single 15 in a ported box tuned to 60 hz .. it's not that flash.... to me sealed is the way to go .... !!! for SQ
im sure one of your mate's a has a ported or seald box you can use to see what you like best ?

All depends on what subs they are? Some are suited for sealed, while others will go great in ported boxes...

Depends on the drivers.
Broadly....., a Qts of ~ 0.44 or below indicates that porting will work well, although it's not quite as simple as that

The "Big Girl's Blouse" option is that sealed works well for SQ in most applications.
Porting is more difficult to get right, but if you do it well and you like your loooow bass, then I would look at porting if the driver is right for the application.

It really depends on how well the enclosure is designed and built....I have used both and if built properly you can get great results from each of them....most people go with sealed enclosures because of space constraints...and they want slightly more output at lower frequencies than a ported box will provide....also sealed boxes are a little bit kinder if you like to flog the hell out of your subwoofer....because the subwoofer cone is unloaded below the tuned frequency in a ported enclosure the subwoofer is more susceptable to being damaged from being overdriven...

Not neccesarily.. The reason why many automotive subs don't play that low, is because they simply don't need too.. The cabin gain does all the work down low..

Also, around (and above) the ports tuning frequency, the cone in fact moves much less than in a sealed box with an equivalent frequency response..

But you are correct that it definitely depends on the subwoofers in question..