90 Celi GT-S

Im gonna be running 2 alpine 15's on an m1000,
sealed enclosure. (i think ported sounds like ***)

anyone out there done much with them? Im building the box and right now would be a perfect time to get the volume just right.

Would it be advisable to build it a little smaller or higher than alpine specs? Why?

thanks everyone

Bigmike216

WinISD says 5.919Cu Ft for a pair, and 2.959 Cu ft for a single driver. Will give you a QTC of 0.7

90 Celi GT-S

hmm, wow.
i built to the specs alpine gives of 1.25cu ft + dsiplacement.. so like 1.6-1.8

i could make an adjustment to the box and totally have enough room, but it kinda takes from the design...

damn

90 Celi GT-S

what would the bigger volume give/lose?

90 Celi GT-S

i am gonna be runnning the 2 1521d's off an m1000

(we had the 12's set up off the m1000 and cooked one at the show in the caprice)

i listen to alot of techno, and like the cleanest bass possible, but i went with 15's to achieve lower frequencies. what would be the best medium would you think without going much higher than 2cu ft?

Bigmike216

2 cu ft for both? That's kinda small [img]smile.gif[/img]

90 Celi GT-S

oh, no no no thats for each sub, separate enclosures each. were you guys talking combined space?

90 Celi GT-S

hi? whats with the forums these days, its like ppl get bored half way thru helping someone.

2 8's AKA Jeepbeats

iTrader: (19)

Have you tried contacting Alpine? The thing that I found strange with the Type R/S subs was that they give very vague box recommendations. I ran the numbers through Bassbox, they recommend 2.75 cubes for the pair, sealed. That would give a QTC of .57 which is very flat. For a QTC of .707, it recommends 1.4 cubes for the pair which seems ridiculous. I read a report on the Type R 10", they ran it in .6 cubes sealed I believe it was. Alpine recommends anywhere from 1.3-2.5 cubic feet per sub. 1.3 per sub = QTC of .579. 2.5 cubic feet per sub = QTC of .487. [img]graemlins/dunno.gif[/img]