The beauty of the this system is the simple xo.
Getting very nice "flat line" response (+- 2.5db).
Loving the robust bass also.
Note the wire AWG and DCR of the coils, very important!
A "P" core inductor can be used for the woofers, but Madsiound has a good deal on 1.2ohm 12 gauge foil-coil
The red felt lined box below is 9" wide x 25" tall x 13"deep.
[The New BB boxes far right post #357 are 8-3/4" wide]
Ports can be calculated as you wish, getting good results here using WinIsd.
E.g. the unfinished BB box has a 7 1/4" wide port x 5/8" tall, which tuned up nicely at 38hz.
Originally Posted by DIYDUGG
Designs are out there now!!
This TMM/MTM/MM design may be in here somewhere, so please excuse if so.
It is nice to see these designs, especially the Renditions. I have heard the Renditions many times - my good friend (Hongrn over on the Parts Express Tech Talk) designed these. The bass output is impressive.