Originally Posted by mos6581
2. The frame for the screen and some of the support for the false wall will be in front of some of the subs. Will this affect the bass array?
I don't think so. My old DBA was behind an acoustic transparent screen (with framing) and behind curtains. It didn't have a measurable affect.
3. To be able to support the weight of the subs and get them into the right height, I've been looking into using some adjustable workshop shelf(I've no idea if this is the correct English word) but only using the needed shelfs. Will this have any impact on the bass array. i.e will it reduce the mirror effect from the ceiling and floor so the axial height modes will still be present?
I don't think so, either. Just give it a try.
4. Is it any other advantage of using a denser array than 2x2 than to increase the upper frequency for the array? Or to ask the questions in a slightly different way; Is it better to use more cheaper and smaller drivers than 4 killer woofers? I will go DIY for the subs if I decide to go the SBA with absorbing back wall route.
Beside a higher grid density, smaller drivers usually have a higher efficency when comparing with a bigger driver with same membrane size. Force factor per moving mass is higher (BL/Mms
). Which means they need less amplifier power.
5. Is there any other benefits than to save space to use low profile cabinets like FoLLgoTT have used?
Some people asked if it makes any difference to integrate the absorber in the baffle wall. Here are the results of simulation.SBA without absorber:SBA with ideal absorber on the front:
The answer ist: yes, it makes a big difference!
Which is logical, because the first reflection from back wall interferes with the direct signal causing these dips. When the absorber is placed on the rear wall this interference is eliminated. So placing it on the rear wall is the way to go.