Ok im going nuts trying to get these things to sound right. Ive got 2 12 inch type rs running of an Eclipse ZA1200 amp wired at 2 ohms which it puts out 1200 watts at 2 ohms give or take a few. I know right now that the box there in is too big, im guessin around 1.7 per chamber sealed. Alpine recommends 0.75 to 1.0 cubic feet sealed, the subs are a one note wonder and picks up every other note and just sounds mooshy and too boomy. Could the wrong box be causing all these problems? I was thinkin about this one, It says its 2.0 cubic feet so im guessing that its 1 each side and i did the math with the measurements and its pretty close too the type rs needs.

http://www.sonicelectronix.com/item_...2SL12-2.0.html

go to audio enhancers website. They make a box just for type r'* and tthey are high quality

i cant find one that is type r specific, and the ones they do have that they say would work with alpine are all the wrong cubic feet.

call them and tell the what you have and ask them what they recommend. They know there stuff dude. I got one of their boxes for my single mtx 9500 15" and I hit 142.7 db in a comp...

I found one that they says is recommended for the type r, but it says its tuned to 40hz isnt that a little high.

that'* way high. That has to be a misprint. Did you call them? 40hz? Lmao! That'* like a db drag box!

What is a proper range for a Type R to be at?

I would say low to mid 30'* on all subs on music. Maybe 40 isn't too high but it seems like you won't get any low low bass. A box tuned at 40hz will still play in the 30'* too. If they say that box is perfect for the type r I believe them though. They build their boxes based off of the manufacturers specs. They literally get permission from these companies to make boxes for their subs

Just a quick question; why don't you build your own?

I built my own for my sub simply because I needed a 3+ cubic foot box and I had serious space constraints.

It wasn't 100% perfect as the place I took the MDF to get it cut didn't do it properly (look at the bottom of the front panel), but it sure does work extremely well with all the bracing and glue I used. Its unbelievable how loud this thing is, and I'm sure it will look decent once I get it carpeted.



This website will even tell you exactly what size pieces to cut and what size and length to make your port in order to tune to a desired frequency.

http://www.reaudio.com/speaker_box/LPort_Box_Calc.html

By the way, I also have an Alpine R12 in the Bonneville that used to be in the Regal, though its only a single sub. That sounded decent in a ported 1.25 cubic foot box.

Im not very good at making things out of wood and i cant stand to listen to the crappy bass for long, so im trying to get a quick solution. And the dimensions that audio enhancers gives for that box is nowhere near the dimensions in my type rs owners manual. After looking at their other boxes i found out that most if not all of their ported boxes are tuned to 40 hz. In the manual it says that the sealed box range should be 0.7-1.0 cubes and for ported 0.75-1.75 does that mean you could have any box size in that range, also does it matter how much power you have?