How's this soffit design?

(See the design at the bottom) I've been reading a lot about soffit mounting on this forum I'm still not sure if I got it, so please tell me if my design is flawed. The speakers are at a 70 degrees angle instead of the usual 60. The MDF boards are 1220 x 2440 cm and 22 mm thick. I'm using allmost a complete board for the front bezel (1000mm x 2440mm) (the bigger the bezel the better right?). The bezel only touches the frame and not the speaker and it's stand. Because the MDF boards aren't as high as my room there's a gap at the bottom, which I can use to run cables through I guess. I will probably give the stand a heavy base so it won't move/fall over. Or maybe I'll glue it to the floor. Next to the soffits are absorbers, which are just fibreglass panels between the framing with fabric covering it. So what do you think?

That looks OK except I'd replace the red section with a slot resonator instead of the cloth - I'd do the cloth thing in the rear corners. cheers john

John Sayers wrote:

That looks OK except I'd replace the red section with a slot resonator instead of the cloth - I'd do the cloth thing in the rear corners. cheers john

:D Nice! With the varying depth from the wall (behind the slats) would this turn into a broad(er) band resonator? Is that a good idea? I wasn't planning on using slot resonators at first so I'll have some reading up to do again :). I should tune the resonators to a problem frequency, right? Like the first fundamental between those two walls? (I realize that I should've put that question in the Acoustics forum, but I'm posting it here anyway! :twisted:)

The slots give two factors - one is it creates a reflction free zone so right speaker signals are reflected behind you and don't get to your left ear - the other is to absorb the low mids - 150 - 400hz where the 703 starts rolling off in it's absorption. cheers john

So tuning them to 65 hz isn't a great idea anyway because the 703 (I'm using another, similar product btw) doesn't absorb well at that frequency anyway? I'm not sure what depth I should input in the calculator, because it's varying. And I'm not sure what frequency I should tune it to!

Slots aren't designed to go that low - i.e below 100 - 150 hz as you'd need a lot of depth to get down there. cheers john