Bass outdoors....what I've done prior was use my 16 year old Atlantic Technology sealed 12" sub along the front wall
In the picture above, Sep-2012, I actually used my basement HT floorstanders Paradigm Monitor 9's as R/L running them as full size with the big CC-390 as center, with the Denon 4308CI.
With that AT 12" sealed sub and mains running full size the low bass was "decent", and I went to full 0db MV - that's pretty loud outdoors, fortunately I'm on 2.5 acre so some space between neighbors, who are usually also watching the flick.
btw outdoors I turn off any EQ, just measure speaker distances, run test tones for speaker leveling, and that's it.
At a minimum I was going to now use my DIY 12" ported sub.......as it's also located in the family room, key thing to remember is I need set-up and take down time to move the gear in/out, I've done the outdoor event 5 years now since 2009.
However......your question did open me up to one or two possibilities......
Since the garage is "my domain"
... I might be open to re-purpose a sub-driver just for outdoor HT events...
Crazy idea ... I've made 3 DIY subs and have a 18" and 15" SI D2 driver (sealed cabs, used in basement HT), and my recent 12" Ultimax Ported sub used in family room.
I have 3 drivers, I could remove 1 from it's sub, use for outdoor event, then put back into it's sub afterward.
So with help/modeling I might make a horn sub driven by one of those just for epic outdoor events....have it located inside the garage and shoot thru an appropriate sized opening.
Seriously, my garage has a bonus room above with stairs, I could locate a horn sub under those stairs and it's throat would exit to the outdoors. I'd "just" cut a removable plug thru the garage siding, it's stick frame construction so not a big issue.
That would be to the lower left of the screen, located on front wall so in phase with mains.
or, just move all my DIY subs out there and let them rip......
To not clutter your design/build thread I'll go ahead and make a separate thread on my combo "family room + Outdoor HT SEOS" speakers.
What's cool about this DIY stuff, it stays with you the rest of your life, since I'm 51, these will definitely see combo indoor/outdoor "duty" for the next 8-10 years while my 3 kids ages 12/10/8 now are still around thru High School.
And something to talk about with family/friends as they come over thru the year's...how these crazy guys on AVS forum helped me way back when...Edited by mtbdudex - 1/11/14 at 4:01am