In the past, I had two Sony 10" subs rated for 600W max each. I powered them with an old Rockford Punch 60ix dual channel amp.
In my new(er) car, I can't put a box in the trunk, because it's too well insulated from the inside of the car.
I've designed a box for one 10" sub and I've layed it all out to build from fiberglass. I currently only have my crappy 10" Sony Xplods. In the past, they didn't sound terrible, but they were in a bandpass box, which they weren't made for. They seemed loud enough for the most part.
I can only fit one 10" sub if I build this box, it will be about .75 cu ft. I'm wondering if later on down the road (when I have the money), I decide to replace the 10" Sony sub with a good 10" sub, will I be able to have get as much volume out of a good 10" sub as my original setup with two Sony 10's?
The answer is yes, Most decent 10" subs are optimized in a .75 ft^3 sealed box. At least all of the ones that I have delt with. If you have it set up right, a single good 10" will sound just as good as a dual 10" set up.
Chris
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Alpine CDA-9833 HU
Diamond Audio M661 Components
MTX Thunder T6.6 Components:rear fill:
Cadence Q400 4 Channel Mains + rears
Thunder 801D Subs
MTX 1004 10's
Dual 4g wire to rear
4g grounds
Before you go buying just any 10" sub, actually learn about which subwoofers work well in that sized box. https://www.diysubwoofers.org/ can get you started.
I would buy a single 10" if you want sound quality. If all you want is bang, go with two. (in general)
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New Project: 2003 Pathfinder