I plan on istalling 4 adire tempests in a ported enclosure tuned to 30hz and using a hifonics bx1500d to power then. they will be installed in my minivan. will this be loud. any comments are appreciated. ty
Especially 4 15's, good 15s at that, in a ported enclosure. It will definately hit very hard, over 150 if done right with a good amount of power. Of course, it always depends on the vehicle, a minivan should get pretty loud.
The tempest wouldn't be my first choice...it performs quite well in homes (which it is designed for) with its high Fs it requires a large box to get good low end extension. i'm not saying it wont hit...but in sealed boxes it will roll off around 35 or 40hz. i'm to lazy to look it up in my box calculator, but i've done it before and its something like that. in a larger ported box you could get a very flat freq. response down to the mid 20's prly. good luck
Like I said, it depends on the vehicle among other things. I didn't get into what mic he would be using etc, but those 4 15s are capable of 150. It's not always about power, those subs don't even need 300-400W each to get to full excursion.