Possible sound leakage into Recording booth - urgent!

Hello! There are only few things left to plan, then the building of our studio can begin! Something I`ve never seen being discussed here is the sound radiating from the back of a monitor chassis... We will soffit mount our speakers. We decided to build Barefoot`s design because it`s a bit more flexible. Our problem is our recording booth behind one of the monitors. How much sound will radiate into the booth?? Ideas?? Worst-case scenario: Recording very soft vocals with loud playback playing in the control room... :-( We will install 20/20bas monitors (red on the picture) on a massive stand made of wood. We will install a thick bezel on the front (more than 3cm of wood) which won`t touch the chassis. Behind the Speaker we must leave little space for cooling the amp. Rest of the space in the wall will be filled with rockwool. In the booth there gonna be two layers of plasterboard. (Take 3???) This is one thing I can`t really imagine and it`s almost impossible to try out before building the whole thing... Please help me not to make a mistake in planning this detail! :roll: Thank you very much for your help!! regards, Schroeder PS. Don`t wonder about some strange details depicted... Not all stuff is "switched on" in this view...

Hi Schroeder, I think your wall thickness of 13,4 cm is not much to isolate the sound coming from the back of your speakers. Are you building a 2 framed wall whith one frame seperated from the other or is it only one frame of studs whith 2 layers of gypsum on every side? I would go whith two seperated frames and air gap between of them this will give you the best stc . Better is to use 3 layers in the studio and 2 layers in the booth. The other option is to use some small nearfield speakers whith less bass for recordings. I myself have built an 2 framed wall whith 2 layers gypsum on every side in my studio. The wall is 22 cm thick. Whith my little auratones I hear nothing coming trough the wall and whith the adam s2a I hear the bass a little bit if I have the level at 95 - 100 db. But I only record whith the auratones so that is no problem for me. An don´t forget I have my monitors both freestanding not wall mounted, but who knows maybe I will do this in the future. :D

I have overseen that the speaker distance to the wall of the both is 13,4 cm. I thought your wall is only this thick :) But anyway I would built an complete wall not only 2 layers on the vocal booth side.

Building a "complete" second wall with layers on both sides of the studs could be a solution, but also could be overkill. I really don`t want to spend extra cash and time for something that is not necessary... The sound radiating from the back of the speakers should be ONLY produced by the vibrating chassis, because the speakers are pointing into another room. The wall-in-itself should be very effective with an average thickness of 30cm, different amount of layers (masses) on both sides, etc. Is there anybody who has some experience with soffit mounted speakers and a live/recording room behind them??? Please tell me how you dealed with this issue. regards, Schroeder

Come on, nobody there with a recording room or vocal booth behind soffit mounted speakers?? :-) Problem or no problem??? Schroeder

normally speaker soffits are inside the "containment" walls.