Basment Controlroom Berlin

the side walls won't have hangers (necessarily) because the slat resonators are sealed units. use the space in the front and rear corners, and overhead in space above the clouds to add additional trapping. on the side door, put a thick absorber so you don't get reflections off that. as far as computing the rays, using the protractor tool to draw lines off your speakers at (say) 60 degree angles to the walls and accounting for the wall angle, the combined new angle (a 60 degree line hitting a 15 degree is 75 degrees...) but overall, in your plan so far, it looks like that won't be an issue. the main reflections will be ceiling and floor and off your desk and other equipment near by. on the back wall plan on absorption with some hard surfaces to preserve the HF energy so your room isn't dead.

thanks for your reply.I' ll try to find the reflections using the angles.I understood that the slat resonators dont need hangers.But my problem is the frontspace between the soffits since its only 10 cm deep and i dont know how to fit hangers in that small space ?Is there a problem with my design? I went back 40% from my isolation wall and used 30% angles for my soffits but in my design it doesnt give me enough space for hangers and i read that i shouldnt go back to far.So do i really need hangers in the front wall or will a normal slat resonator be efficient enough?I was just concerned since i saw most design using hangers and because I' m going to be mixing hip hop.Do you have a sketchupfile for a backwallabsorber.Do think i could build a second door infront of the rear glassdoor wich could implement the absorber. I hope i could explain what I' m planning to do. Thank your for time and feedback. Andrew

if you don't have space for the hangers use plain absorption - a layer of rigid insulation and fill the remaining space with the light insulation (pink etc).

thanks Glenn. This forum is a real help for me.Thankyou for taking your time to answer my questions. Is the Knauf ecose comparable with the pinkstuff?I would like to use it since i've worked with it before and it doesnt itch or irritate the skin.If not not is there anything comparable in europe? Andrew

Knauf should be ok, otherwise Isover Insulation from Saint Gobain is widely available from building centers throughout Europe and is virtually identical to the Corning products.

thanks Brian.

Here's an updated version of my sketchupfile. I would like to start construction soon at least begin with the front part of the Room.Is my design okay so far that i could get started with the soffits and slats? Would the absorber the way i designed it on the rear workout?What about Clouds? I was thinking of hanging up three of them. Hoping for some feedback. Andrew

i think the design looks fine. definitely consider the HVAC needs and then sort out the clouds.

:D Okay im working on the framing of the soffits and slats now and will post the sketchupfile when im done.I have another question.I havent really decided what speakers i will use but i thought about the Jbl lsr4328s.They are rear ported and i have seen some people soffit mount them.Is it okay to use rear ported speakers for soffitmounting? Could you send me a detailed file for a rear wall absorber? thank you very much Andrew

for the rear wall absorber - assuming you mean over the windows? i would use 6" deep 48kg/m3 insulation covered with plastic and cloth on 1x 16mm drywall on 2x 19mm plywood (hinged as you show) with requisite seals. this should be a decent level of mass and absorption.

Thanks for your quick reply. The Windows are actually doors and are supposed to supply the fresh air.Should I add slats on top of the absorber to keep more highend?

:roll: Okay i guess i wont really need slats if its covered with drywall and plywood.Is the drywall on the frontside of the absorber or the plywood?Maybe you could supply with a simple plan. Sincerely Andrew

the drywall and plywood underlays the absorption part. so you'd want to add some slats over it.

:oops: I think i got but just for my understanding.I will take a sheet of drywall 16mm and build a frame or a box of 19mm plywood on top of that.Fill it with 6' or metric 16cm insulation which i will wrap in plastic and cover with cloth(burlap?)and add slats to preserve more highs. thanks for your patience Glenn. Andrew