I've started to hate planning my build for 2 American Bass 10's that will go behind my seat of my wrangler. This design idea is that it they can be played while the rear seat is still there, so I made the box at more of an angle than the seat is so there a bit of room back there for the sub. When I so choose so, I can fold the seat forward so it doesn't matter at all when I don't have passangers. If anyone has tips for this type of "behind the seat enclosure" please let me know because it seems like a difficult task compared to a regular box build. But basically I ran into 3 issues.
1) The cardboard mock up I made shows that I can squeeze out 2.7-2.75 cubic feet minimum behind the seat (only accounting for MDF displacement.) I think I may be able to squeeze a bit more out but I'm playing it safe with these numbers for now. I read on the American Bass website that each sub requires 1.25-1.5 cubic feet, but not given any real T/S parameters, I don't really know what would be optimal for a ported box of this build. I spoke to the owner, Bob, on the phone and he recommended a box of something around 4 cubes, which I wish I had, but also seems a bit oversized. Nice guy, but never got back to me with the T/S parameters. Do you guys think that giving a minimum of 1.25 cubes per sub after everything would be enough?
2) Since this box is pretty slanted, I only got a little over 3 inches on the top side of my box. This doesn't leave me with a lot of room to make an aero port on the top like I planned on doing before. I can try to do on on the side but even then I can't squeeze much port area out of the side either because the box is so thin and wide. I could also try putting a port in the middle, top, front part in the box where the box is a couple inches away from the seat, but I'm thinking that's going to affect it too much. I can also try extending the box past the seat, but I don't know well it would work to be honest. I'm also considering a side port, but there are so many ideas that just don't seem to be easy. How much space should I have from the surface of the port? Also should I do 1 or 2 port(s)?
3) My old setup was facing right against my trunk and I found it to be much louder in a friends car when in a conventional trunk. I still think it was considerably louder in his trunk too compared to when I put it on my seat. The subs will be mounted close to the floor and at the bottom so I'm not sure how this will change the acoustics. Do you think having the subs facing into the cabin and close to the floor allow for much loading on the driver for good cabin gain? Also do you think the seat folded forwards allow for some loading since the subs are pointed towards it?
I know this is really hard to conceptualize, even with it in front of you, but I'm kinda stumped on it so I came here. Here's pictures I took off google of the trunk, just ignore the metal storage shelf in the picture. I planned out to make the box go all the way up the seat. The other picture is what it looks like when the seat is folded forwards all the way. Ignore the perfectly engineered subwoofer build they made.
TL;DR:
1) Is 2.7-2.75 cubic feet of internal volume (not accounting for port and sub displacement) good enough for 2 American Bass 10's?
2) What type of port do you recommend and where do you think I should put it? Should I do 1 or 2 port(s)? And how far do I need to make a port away from a surface?
3) Do you think I will have issues with phase cancelation, or not enough loading for the sub? Will the seat folded forwards allow for any loading to occur? I'm not too well versed in the acoustics of a car.
Thanks for the help on this huge post!
1) The cardboard mock up I made shows that I can squeeze out 2.7-2.75 cubic feet minimum behind the seat (only accounting for MDF displacement.) I think I may be able to squeeze a bit more out but I'm playing it safe with these numbers for now. I read on the American Bass website that each sub requires 1.25-1.5 cubic feet, but not given any real T/S parameters, I don't really know what would be optimal for a ported box of this build. I spoke to the owner, Bob, on the phone and he recommended a box of something around 4 cubes, which I wish I had, but also seems a bit oversized. Nice guy, but never got back to me with the T/S parameters. Do you guys think that giving a minimum of 1.25 cubes per sub after everything would be enough?
2) Since this box is pretty slanted, I only got a little over 3 inches on the top side of my box. This doesn't leave me with a lot of room to make an aero port on the top like I planned on doing before. I can try to do on on the side but even then I can't squeeze much port area out of the side either because the box is so thin and wide. I could also try putting a port in the middle, top, front part in the box where the box is a couple inches away from the seat, but I'm thinking that's going to affect it too much. I can also try extending the box past the seat, but I don't know well it would work to be honest. I'm also considering a side port, but there are so many ideas that just don't seem to be easy. How much space should I have from the surface of the port? Also should I do 1 or 2 port(s)?
3) My old setup was facing right against my trunk and I found it to be much louder in a friends car when in a conventional trunk. I still think it was considerably louder in his trunk too compared to when I put it on my seat. The subs will be mounted close to the floor and at the bottom so I'm not sure how this will change the acoustics. Do you think having the subs facing into the cabin and close to the floor allow for much loading on the driver for good cabin gain? Also do you think the seat folded forwards allow for some loading since the subs are pointed towards it?
I know this is really hard to conceptualize, even with it in front of you, but I'm kinda stumped on it so I came here. Here's pictures I took off google of the trunk, just ignore the metal storage shelf in the picture. I planned out to make the box go all the way up the seat. The other picture is what it looks like when the seat is folded forwards all the way. Ignore the perfectly engineered subwoofer build they made.
TL;DR:
1) Is 2.7-2.75 cubic feet of internal volume (not accounting for port and sub displacement) good enough for 2 American Bass 10's?
2) What type of port do you recommend and where do you think I should put it? Should I do 1 or 2 port(s)? And how far do I need to make a port away from a surface?
3) Do you think I will have issues with phase cancelation, or not enough loading for the sub? Will the seat folded forwards allow for any loading to occur? I'm not too well versed in the acoustics of a car.
Thanks for the help on this huge post!
