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How important is box shape when making a sub?

931 Views 10 Replies 4 Participants Last post by  Randy_J, 
W
I'm doing my girlfriends stereo. Its just some 6.5s in the front door and the rear deck. I'm going to be running Rockford Fosgate R165X3 s in the doors and Dayton dsa 175 s in the back. I'm have a 500 watt 4 channel amp coming in to power them.

She said she didn't a sub, because of space, so I chose the Dayton midwoofers because I read the Fosgates lacked on the low end a bit. I was hoping to bring out the bass a little by making a little box below the rear deck. with quick tube.

I could use some advice on if this would actually make a difference in bass and potential other solutions. I was thinking of cutting a slit along the side of the tube wide enough to fit over the speakers and sealing the ends. Maybe filter out some of the high end? I've read it doesn't do so great there. The response curve is below.

How much room would two 6.5s need?

I saw some small 6.5 Plye subs that got okayish reviews. Does anyone have experience with those? Would I need a sturdier box for such small subs?

Would tweeters overpower the system with week bass?

She doesn't listen all that loudly. I just want it balanced. Thanks



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This is the type of tube I was talking about. It would be sealed.
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jcr159
Sonotube subs are pretty awesome... lots of structural integrity for very little weight.. assuming you can cut circles pretty well.

that said, most here are Home Theater focused and you aren;t likely to get a lot of help on car builds...

to figure out the size of the tube, you'll want to use a program like WinISD, HornResp, or BassBox. they will require you to enter the T/S parameters of the drivers, select box type (sealed in this case), and spit out a graph showing response, and the max power to get there, including when you run out of excursion.

you'll also need to figure out some filters to keep things from melting or from running the sub too high in frequency and to do the crossover.

maybe you knew all that already, but I didn't get that from your post above... no offense intended!

to the question as asked, it makes no difference for bass regarding box shape... in fact, look at SVS, they offer several cylinder subs!
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jcr159 said:
Sonotube subs are pretty awesome... lots of structural integrity for very little weight.. assuming you can cut circles pretty well.

that said, most here are Home Theater focused and you aren;t likely to get a lot of help on car builds...

to figure out the size of the tube, you'll want to use a program like WinISD, HornResp, or BassBox. they will require you to enter the T/S parameters of the drivers, select box type (sealed in this case), and spit out a graph showing response, and the max power to get there, including when you run out of excursion.

you'll also need to figure out some filters to keep things from melting or from running the sub too high in frequency and to do the crossover.

maybe you knew all that already, but I didn't get that from your post above... no offense intended!

to the question as asked, it makes no difference for bass regarding box shape... in fact, look at SVS, they offer several cylinder subs!
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No offense taken. I'll need to study up on crossovers. I just got the sb 1000 pro though. It's pretty awesome. I dont think she would be down with having a 40 inch tube in her car all the time.
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R
You can make pretty much any design that will fit. I built this box for a friend to fit under the back seat of a screw F150.

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Randy_J said:
You can make pretty much any design that will fit. I built this box for a friend to fit under the back seat of a screw F150.
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Thanks. Good to know
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WingNut86 said:
No offense taken. I'll need to study up on crossovers. I just got the sb 1000 pro though. It's pretty awesome. I dont think she would be down with having a 40 inch tube in her car all the time.
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That looks pretty sturdy. I'm probably going to go for the tube. Is that cocking or glue?
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J
WingNut86 said:
That looks pretty sturdy. I'm probably going to go for the tube. Is that cocking or glue?
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On Randy_J's MDF box? That looks like PL Premium.
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jcmccorm said:
On Randy_J's MDF box? That looks like PL Premium.
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I just had to do a google search on PL Premium. I'm new. Would that be enough to stick a box to a metal rear deck? Would I need to drill?
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J
Yes. That stuff is freaky strong. Be careful with it though. If it gets where you don't want it, it's tough to get rid of.
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jcmccorm said:
On Randy_J's MDF box? That looks like PL Premium.
Click to expand...

Yes i believe that is what was used. I am pretty sure it was the PL 3X. That stuff is nice and sticky and if there is a gap it fills it easily. It will wear off your hands in a few days or if that is a issue then wear rubber gloves.
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