The need and ability to EQ, and issues regarding SQ, have nothing to do with whether you buy a fully assembled Rythmik sub or, rather, a DIY Kit and a flat-pack enclosure. The Rythmik plate amp and servo driver do all the work for you either way. You just have to make sure the enclosure is air-tight upon its completed construction. The flat-packs are really well made, and go together easily. Actually, if you get the 4cu.ft. version ($120 each plus shipping. The 3cu.ft. is $90), you will get slightly more output than the Rythmik 3cu.ft. enclosure provides. The reason Rythmik can't sell you an unfinished enclosure is they don't get any from their enclosure supplier (in China). The Rythmik DIY Kit contains all you need for completely assembled subs (driver, plate amp, driver and amp mounting hardware, wiring, enclosure polyfill) apart from everything related to the enclosures themselves. To build the flat-pack you will need wood glue and woodworking clamps, which will cost you about $100 (a gallon of glue and 4-6 24" clamps from Harbor Freight). Then you may want to finish the MDF flat-pack enclosure(s), of course. Figure another $100 or so for primer, paint, sandpaper, etc. Add to that grill cloth, and you can see that you actually may not save any money doing it yourself, and have no guarantee the finished product will look as good as an assembled Rythmik. But if you have any woodworking skills, and you want subs finished in a way Rythmik does not offer, you have the option.
The 1510 driver takes advantage of the higher output of the H600 amp by having greater maximum excursion (cone travel) than the 1501, therefore providing slightly higher SPL. There is nothing to be gained by pairing a 1510 driver with an A370 plate amp. The 1510 has a significantly larger motor structure than the 1501 as well. Plus it's one-piece cone looks great!
Last edited by BDP24; 08-29-2014 at 10:33 AM.