Absolute Sound, not Stereophile, my mistake.
Showing 4 responses by terry9
Completed my two channel listening room a bit over a year ago. The quality of silence is surprising; guests remarked upon it as soon as they entered, in pre-Covid days. Dimensions. Snake oil abounds. Fortunately, the real science has been done, at the University of Salford (UK), in their School of Acoustics. The famous Cox teaches there. They ran 100,000's of simulations to arrive at optimal ratios - they found that MOST rectangular dimensions are bad, a quarter are OK, and a few percent are good. Stereophile ran an article about two years ago on construction techniques. They stressed rigidity and glue. I used an elastomeric glue that never quite dries, and it's elastomeric counterpart caulking, called Build Secure and M1 respectively (from Chemlink). Walls and ceiling used 6 layer drywall including an embedded layer of sheet steel, called Quietrock 545. The manufacturer is knowledgeable and very accommodating. Construction techniques are also discussed on their website. Isolation transformers tend to hum when they are doing their job. Best to site them outside the listening room. Don't forget air lines - you just may end up with an air bearing TT or tonearm, or both. Good luck!!! |
@dodgealum Just saw your post. Hope this is not too late. I did an old world solution for my home theatre: sand. I put mixed fine and coarse sand into the spaces between joists, about 2". That is: at the framing stage, double or triple all joists - I used LVL, screwed and glued. Screw and glue (elastomeric M1 works well) a layer of plywood to the bottom of the joists. Fill the cavities with 2-4" of mixed sand. Get an engineer to sanction this. What you have is a preloaded floor, immune from squeaking and fairly soundproof. I guess you could add rock wool insulation above the sand for the last added iota of sound proofing. Worked for me. YMMV. |
I understand that Green Glue is not a glue - it is a sealant or filler. I prefer something that contributes both actively and passively, like M1. Being a strong adhesive, M1 bonds the two layers together, adding their strength. This benefits the occupant of the sound room by rigidifying the walls. Being elastomeric, M1 also dampens. This benefits those on the other side of the walls who aren't forced to listen - but not as much as Green Glue, I suspect. Being selfish, I went with M1 and am well satisfied. |