subwoofer baffle help!

[stingy goose]

I might sound like a complete idiot to you guys, but I honestly don't really care enough to not ask my question.

I am running a Hertz HX250D 10" woofer and am going to build my own box, but when it comes down to cutting the baffle for it I don't want to make it too large that the woofer falls through.
http://gearheads.in/attachment.php?a...5&d=1309344835
That is an image of the measurements of the woofer (underneath 250D).
Where it says mounting hole diameter, is that what I should use for making the circle? I would think it should be a bit smaller otherwise when trying to crank down the screws they would have nothing to screw into.

It says the mounting hole diameter is 232 milimetres, which is 9.13 inches. So maybe around 9 inches even would be about right? I have no template as my friend gifted me the woofer and I didn't get the original packaging.

Any help is appreciated :thumbup:

[Lmcclure]

measure from foam to foam, that will give you a good measurement to go off of, i hope that makes sense.... most likely it will be about 9 inches or a little under 9 inces(i think) to mount a 10 inch woffer

[Lmcclure]

looks like on that site its 232mm or 9.13 inches round for the hole

[stingy goose]

measure from foam to foam, that will give you a good measurement to go off of, i hope that makes sense.... most likely it will be about 9 inches or a little under 9 inces(i think) to mount a 10 inch woffer

Yea I think I know what you mean... from the actual foam around the cone I believe which would make sense, it is the widest point of the woofer minus the gasket with the screw mounting holes

[bobbyspider]

what i usually do is center the woofer upside down on the board then trace the circle and with a compass make another circle smaller than that one by about 3/4" or so. also

[NicholasJackson]

It means 232mm from the center of the hole to the center of the direct opposite side of the hole on the other side of the sub. So subtract the radius of the mounting holes and just a little bit more to be safe. And remember it's easier to make the wholes bigger but not smaller.

Are you going to make the box a ported box or a closed box?

I definitely suggest you do some reading on box sizes and corresponding frequencies, you wanna be on the lower side of 50hz for a real deep bass.

Let me know if there's anything i can help you with.

[stingy goose]

Let me know if there's anything i can help you with.

thanks man! I've done a lot of reading about the woofer I'm using in particular, and apparently this one likes a really small, sealed enclosure, around .6 cubic feet or if you want deeper bass around .7 cubic feet. I'm going with 12x12x8 (LxWxD) which gets it around .67 cubic feet, which is basically as small as I can get it haha.

I'll let you know how it goes anyway

[links56]

Also if you are building a "sealed" box, I can't stress how important it is that it actually be sealed. No air leaks. I caulk all the seams inside the box and I like to use a bike tire innertube and cut it and glue it in your baffle where the speaker sets. That way it seals around the sub itself. I hope this helps.

[stingy goose]

Also if you are building a "sealed" box, I can't stress how important it is that it actually be sealed. No air leaks. I caulk all the seams inside the box and I like to use a bike tire innertube and cut it and glue it in your baffle where the speaker sets. That way it seals around the sub itself. I hope this helps.

do you have a picture of how to seal it with the bike tube? I'm not sure what you mean by cut it, and do you glue it on or just wrap it around the rim and then sit the woofer on top? I definitely have a bike tube though lol

[NicholasJackson]

And if you go port here's a site that calculates the length of the port according to how big the box is.

http://www.carstereo.com/help/Articles.cfm?id=31

I like port better, it kind of filters a little bit of the step response out. You need a bigger amp but it's definitely worth the effort.

[links56]

Well the bike innertube is round like a cylinder so it holds air, so take a razor blade and slice around the outside or inside so you have a flat piece of rubber, and then cut it the length of the circumference of your hole and glue it around the hole so you have let's say an inch width of rubber around the hole. So when you set the sub into place in the baffle there is a thin piece of rubber in between the sub frame and the wood of the baffle.