Recommend box size for single Alpine SWR-1241D

[Tungsten 10+ year member]

First and foremost...

ARGH!!!

Thanks, I feel better now. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I decided to get some large pieces of cardboard and cut out a template for what an end piece of the box I had designed would be like when cut from MDF, and went to test fit that into the trunk of my car. No dice. The angle of the face (wedge shaped box) was too steep and didn't mate up right with the firewall seperating the trunk from the cabin.

So I took another piece of cardboard and a felt tip pen and made a tracing of the firewall's angle so that I could start revising my design. I came up with a 66.5 degree slope, cut another template and went back to test fit it again. Success!

Now I notice that the way the rear wheel wells cut into the trunk, there's going to be less width to play with than previously thought. This means the box will either need to be deeper or taller. Taller is okay, but deeper is definitely out as there's only 11" worth of depth on the trunk opening to slide a box in from the rear of the car.

Have I mentioned ARGH!!!! lately? Heh.

Okay, so I'm sitting here now with a template that fits so long as I am willing to remove the speakers from the rear package tray. That's not a big sacrifice as I don't care to have a rear sound-stage anyway. They're just a cheap pair of Kenwood 6x8's and the gains are turned way the heck down on the rear channel... so done deal. Now I've got the height that I needed.

But wait! There's an unusual hump of some sort (about 5"w x 2"d x 0.5"h) right in the middle of the trunk floor. Another ARGH moment.

So I'm not real sure what I am going to do yet. //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

 

[Tungsten 10+ year member]

Okay, I think I have it now. This box can be slid into the trunk through the cabin of the car with the seats folded down and provides 0.808 ft^3 per chamber after the speaker displacement is deducted from the actual Vb.

Depth 1 (top) = 10.5 in

Depth 2 (bot) = 15.0 in

Height = 11.0 in

Width = 32.0 in

Divider @ 1/2 width (16 in center)

Material used = 3/4 in MDF

Speakers = (2) Alpine SWR-1021D

WHEW!!! //content.invisioncic.com/y282845/emoticons/banghead.gif.8606515f668c74f6de0281deb475b6fd.gif

The good news is that the depth of the top panel is sufficient to allow me to mount my amps horizontally and have nearly 2" of clearance between the top of the heatsinks and the bottom of the rear package tray. Plenty of room for airflow around the amps.

 

[Tungsten 10+ year member]

I'll be sure to take pictures of the finished box and post them here. It's turned into something of an adventure. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[Tungsten 10+ year member]

Just sent the SWR-1241D subwoofer back and will be ordering the two SWR-1021D subs as replacements next week (Thursday or Friday). Hope to have them in my hands before the end of the following week.

This is all good anyway as it gives me time to tinker around with cardboard mockups of the box design and make sure that I have all of my bases covered before I actually start installation. Heck, I may even build the box between now and then. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Tungsten 10+ year member]

Originally posted by Jmac Where did you get the sub from ?

 

Good luck with the box //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

I ordered it from Ike Sound. They didn't have the 1021D's listed so I called them up and found out that they had them anyway. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Tungsten 10+ year member]

Originally posted by Jmac Did you have to pay for the shipping back ?

 

Sounds like pretty good customer service //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Yeah, but we get a pretty good discount on FedEx service here at work so it didn't hurt too bad to ship it back to them. They should have it Monday and then I can set the ball into motion on those other subs.

I think they'd rather give me credit toward the new speakers rather than lose the sale all together... but yes, they do have good service from what I have seen so far. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif