originally i intended to build 2 dual opposed 18" Dayton HO, but now i managed to score 8 Hifonics Atlas ASX 15s for half the price of 4 Dayton 18 HOs shipped to Europe.
I have installed my homecinema in the attic and have big problems to fill the L-shaped room with inclined walls with bass. In my boxshaped living room i get better bassresponse and subjectively more impact with my floorstanding B&W 804s without subwoofer, than in my homecinema with 4 11" in my mainspeakers, 2 active 12" BK Monolith DF + and 2 inceiling (as IB) Tempest 15" corrected by antimode AM8033.
The idea is to use 1 Inuke DSP 6000 to power the 8 new subwoofers and use the DSP for correction of delay/phase to combat cancellations/room modes.
If the DSP of the Inuke is not up to the task (it is only 90€ more than the non DSP Inuke) i might have to get more control in the form of a MiniDSP.
So much for the situation overview.
Now, for the 8 ASX15, i am considering 3 main options and i would like to get some advice/ input about the pros and cons.
1. Build 2 quadruple enclosures of 500 to 600 l each (LLT) (similar to those built by my brother described here http://www.hometheatershack.com/for...56-500l-llt-12hz-8x12-4x15.html#axzz2KEZQkZMV
), to be placed in the left and right corners next to the front tower speakers. I tried to simulate 18 Hz tune in WinISP alpha (old version from their website, because the newer version from their forum would not let me save the T/S parameters) and i simulate [email protected]
Hz without roomgain with 2kW per channel with just one enclosure.
This should ensure more than enough headroom.
2. Build 4 dual enclosures of roughly half size LLT, same tune, 2 in front, 2 in back. Would there be any benefit of going double opposed?
3. Build 1 quad monster to be placed under the screen and 2 duals to be placed left and right of the front tower speakers, thus coming close to a line array.
The 2 existing (and much smaller) Monoliths could be used to fill in any FR gaps, since they are much easier to move around.
The enclosures will be built with 21 or 25 mm cabinet grade birch MPX sourced (and cut to size) from a befriended cabinet builder pro.
Once i have decided which of the above variants will be built, i will post some sketches, maybe even in sketchup (i am still cutting my teeth with it).
I will use 4 inch round ports (PVC drainage pipes already sitting in the garage).
Bracing and such will only be addressed once the final design is settled.
I am open to any critic and suggestion, but due to the size (and weight) of the beasts to be built , i' d rather get it right the first time around.
I will have to do all the woodwork in my garage, then test fit, carry all the stuff 3 levels up and do the final assembly and staining in the home cinema.