Soundman2020 - Studio Design Forum

no, i'd keep the longer room 7.2m as-is. the thing you will want to work on is the RT60 (or whatever it really is in a small room) and that can be via scattered absorption placement as well as the usual first reflection points, back wall, heavy drapes as needed etc. to get the room balanced.

more like this: https://www.knaufinsulation.com.au/product/climacoustic-rigid-plenum-liner you generally want perforations or other open-face-like absorption, the faced products will produce less resistance but not as much of the MF and HF component absorption which is highly desirable. this product...

typically the listening seating is some form of couch - which is a bass trap :-) and the modal distribution in a room doesn't usually favor that location if the primary listening position is the front of the room. as far as improving the LF response in the back of the room - an addition subwoofer tu...

i would go with the longer room - you can see in the Benollo scale how much more even the mode distribution is per octave. then presuming the windows wall is the lower part of the pitch, i'd face that wall centered between the two windows.

quieter is betterer :-) the thing about quieter though, is when things are quieter, you can hear more noises :-) you might measure ~1m from the vent openings on the plenum just to get the level at the opening. as you build out the soffit, with absorption etc, then you may find it reduces a bit more ...

your silencer does not have to be the plenum. you could create the silencer effectively with the same area of the duct, then expand into a plenum to get the velocity reduction. you could also create the silencer to vent in both sides to plenums there to make the air flow symmetrical around your desk.

coolio. one option is to install a couple or three 1x boards running perpendicular to the joists (paint to match the ceiling) and attach there as if will provide more flexibility in placement. you can use toggle bolts through the board and ceiling to ensure enough strength.

rings would be fine. glad that there is minimal vibration as-is.

the isopod would certainly (well almost certainly) provide isolation at the higher frequency unless they're specifically matched to the speakers - the whole point in the isolation is to get the natural resonance down to about 1/3rd of the lowest frequency of the speaker. so if the low end is say 39h...

yep

the main issue isn't venting, and most times the passive air flow will suffice, it's the open port on the back of the speaker - being buried in the soffit, or plugged will change the overall speaker response - which may be better if plugged. another is remove the electronics and create a backing pan...

not sure what your level of acoustics treatment is besides the mattress, but if temporary, then more wall and ceiling mounted absorbers which are little more than picture hooks or some small brackets to mount. overall the response is consistent across the spectrum so whatever the settings are they a...

a full size mattress which is filled (not simply springs) can absorb quite a lot of LF energy. overall - with the sub - the response is decent +/- 8db with 1/3 smoothing and if you don't have the first reflection points covered top and sides, then you'll want to add those. the desk (the 1.5ms reflec...

looking good. remember though, too much yanking can impact your eyesight

the MLV could be useful for the mass as well as some damping of the cabinets forming the duct. in general, parallel runs of high freq protocols with electrical an add noise to the electrical. so spacing at least a 750mm apart from the electrical - although running those low power cables together sho...