DIY 18 Options for Small Theater Room
I've just moved into a new house with a dedicated theater space and getting my system back up and running. At this point the room is mostly setup and will be a 7.2.4 setup in a 11.5x17x 9 space so 1,759.5 cubic ft. I currently took my old SVS SB2000 from my music system to use for now to do some testing and the rest of the system is Kef R series for the fronts and kef CI 8 inch for surrounds and atmos. Doing the math the room should boost everything below 30Hz and below. I did some sweeps with the sub on the left of the equipment console and right of the equipment console as I only have the one sub until i build some new ones and it confirms the sub 30Hz boost. I am looking at building 2 18 inch subs and they will be on the front wall below a projection screen when the room is complete. Looking at the in room response I don't think that i need something like a Full or even mini marty and i doubt i could get that to fit. I think the max height i want is about 30" so a Johnny Sub with modifications is an option and i will be building it myself as i have all to tools so i can modify the dimensions somewhat to fit and i have not purchased my final console yet but it will probably be the 47" ikea besta. For amplification i will be using some spare parts form work to create a 1500W per channel using 2 pascal LPRO2S modules each in BTL mode and controlled by a Analog Devices ADAU1452 DSP. ( it's a bit overkill but that's what we have ). What i am really confused about right now is there are so many options in the DIY 18 space that the speaker selection part is all a bit confusing. I was looking at the UM18-22 but then I have seen the FI HT-1 and HT-3 pop up but they don't seem to be as common but model similarly at this price point money is not the major issue and it is more about fitting a good solution in the space. I'm just looking to hear some input from those with similar smaller spaces. This will also be probably 90% or greater home theater use. Not sure if i would want sealed or ported at this point either due to the in room boost.