07 lucerne + 2 type R's

i've built probably over 40 boxes for the 12" type R. the box will perform if it is bigger. 2 cubes per sub if running lots of power (like a 1000rms or more) and 2.5 cubes if running less power. tune it to 34Hz. use a single 4" flared port per sub. on paper this isn't enough surface area but the type R's like it this way. for the two speakers you could also run a single 6"-- more expensive but generally a 6" outperforms 2x 4".

 
i've built probably over 40 boxes for the 12" type R. the box will perform if it is bigger. 2 cubes per sub if running lots of power (like a 1000rms or more) and 2.5 cubes if running less power. tune it to 34Hz. use a single 4" flared port per sub. on paper this isn't enough surface area but the type R's like it this way. for the two speakers you could also run a single 6"-- more expensive but generally a 6" outperforms 2x 4".
I agree with everything, except tuning. They do like 2-2.5 cubes. I like mine tuned to 32, but I've seen 30-36 work well actually.

 
I agree with everything, except tuning. They do like 2-2.5 cubes. I like mine tuned to 32, but I've seen 30-36 work well actually.
it is a matter of preference of course. 34Hz seems to be a good balance between playing loud and getting low.

 
so i built a pretty standard 2.2 slot ported box. speakers up and port to the back ( i have a autoCAD 3D file of it but cant figure out how to convert file to post) and it made a world of difference. at specs these 12s were suffocating.

 
so i built a pretty standard 2.2 slot ported box. speakers up and port to the back ( i have a autoCAD 3D file of it but cant figure out how to convert file to post) and it made a world of difference. at specs these 12s were suffocating.
You only made the box 2.2 cubes for 2 12s? That's way too small for a ported box. It should be 2.2 cubes for each sub

 
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