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Single Alpine Type R 12" Ported Box Design. Feedback Pleease?

After some long hours of research and designing, I think I am finally ready to start building the enclosure for my alpine 12" type R sub. I took into account the factory recommendations when designing this box.

The outer dimensions are 24" wide x 13.5" deep x 13.5" long. Built with 3/4" MDF. It will be L ported, with first length being 10" and the second being 8". The width of the port will be 1.25". The total volume of the box will be 1.679 cubic feet (this is after subtracting the woofer and L porting displacement.) The box will be screwed, then glued together, and carpeted.

I will be using a Rockford Fostgate 1000 watt monoblock amp with the sub wired at 4 ohms, which will put out around 500 watts rms. Tuned for 34Hz. It is being put in the cargo area of my 2001 Ford Explorer Sport.

This will be my first box build, so any feedback or suggestions would be much appreciated.

Picture:

Attachment 26532857

Re: Single Alpine Type R 12" Ported Box Design. Feedback Pleease?

Re: Single Alpine Type R 12" Ported Box Design. Feedback Pleease?

Quote:

Originally Posted by

**mpepin** After some long hours of research and designing, I think I am finally ready to start building the enclosure for my alpine 12" type R sub. I took into account the factory recommendations when designing this box.

The outer dimensions are 24" wide x 13.5" deep x 13.5" long. Built with 3/4" MDF. It will be L ported, with first length being 10" and the second being 8". The width of the port will be 1.25". The total volume of the box will be 1.679 cubic feet (this is after subtracting the woofer and L porting displacement.) The box will be screwed, then glued together, and carpeted.

I will be using a Rockford Fostgate 1000 watt monoblock amp with the sub wired at 4 ohms, which will put out around 500 watts rms. Tuned for 34Hz. It is being put in the cargo area of my 2001 Ford Explorer Sport.

This will be my first box build, so any feedback or suggestions would be much appreciated.

Picture:

Attachment 26532857

Hey how did this box turn out if you build it I'm doing the same sub but the newer model don't know if I should do it bigger or not

Re: Single Alpine Type R 12" Ported Box Design. Feedback Pleease?

Definately go bigger. Sweet spot is about 2.5 for those

Re: Single Alpine Type R 12" Ported Box Design. Feedback Pleease?

Bigger. I know Alpine specs say something like 1.75 but the Type R's (at least the older models) like 2.25-2.5.

Re: Single Alpine Type R 12" Ported Box Design. Feedback Pleease?

Do you have the older one or newer one? I have the first gens and plan to make a ported box after I start work, and get rid of this sealed one. Let us know things work out!

Re: Single Alpine Type R 12" Ported Box Design. Feedback Pleease?

OK i have a type r 15 that I was wondering if getting a bigger box would help hit the lows harder i guess, I have a bassworx box that sounds good, well better than the one it was in before, but I want to know if i got a 2.3 or even a 2.9 cubic feet box that it would hit harder. the one it is in now is a 1.94 cubic foot box and i am limited in space. This is going in a extended cab s-10.

Re: Single Alpine Type R 12" Ported Box Design. Feedback Pleease?

iirc those like tuning around 27hz also.

Re: Single Alpine Type R 12" Ported Box Design. Feedback Pleease?

i got my new gen type r in one of them bbox boxes.. read on their website its the recommended size an they work together. im pretty sure it'll sound better in a bigger box mines just got a punch to it. no rumble if that makes sense

Re: Single Alpine Type R 12" Ported Box Design. Feedback Pleease?

What's the software you used to model your box?

Re: Single Alpine Type R 12" Ported Box Design. Feedback Pleease?

Quote:

Originally Posted by

**Camren Trevor** OK i have a type r 15 that I was wondering if getting a bigger box would help hit the lows harder i guess, I have a bassworx box that sounds good, well better than the one it was in before, but I want to know if i got a 2.3 or even a 2.9 cubic feet box that it would hit harder. the one it is in now is a 1.94 cubic foot box and i am limited in space. This is going in a extended cab s-10.

I was going to run a Type R 15 in my daughters car. The box I was going to use was 3.5 cubic ft. (after displacement) tuned around 32. So a 2.3 or 2.9 would be waaaay too small imo.