Got one soffit installed and will finish the other one tomorrow.. Rain coming later in the day tomorrow and not letting up for maybe 2 weeks. Super bummed..
Finish work always slows me wayyyyy down!!!!
I got a bunch of 1" So no worries there...4x8 sheets...
Last edited by Stadank0 on Wed Feb 28, 2018 2:20 pm, edited 1 time in total.
You might as well do a REW test, just for the record: even though there's no insulation in the rest of the rear wall, it's data that might be worthwhile having: it can be compare to the other test when the entire rear wall was empty, to see what effect the soffits are having. Should do a little to the low end...
Soundman2020 wrote:Beware when companies try to sell you acoustic products that are "just the same as X, but much cheaper"!
It wasnt like the company tried to sell me something - I chose from the products that were available locally and had some information.
Soundman2020 wrote:For starters, if what you got is mineral wool, then it is nothing like OC-70, which is a fiberglass product. With a density of 45-50 kg/m3, it might still be reasonably good for bass trapping, but it won't be the same as 703.
The only way you'd be able to know if it really is the same as 703, is if you compare the actual acoustic data for that product, as measured in a reputable independent acoustic test lab...
Yes, the one i got is a mineral wool product. I wrote the manufacturer before purchasing and they sent me an independent acoustical laboratorys measurement result for 50 mm thickness product. While it was a bit lower than 703 - the general absorbtion coefficient values were pretty close when i compared them to the data in OC datasheet. So I was pretty confident ordering.
Soundman2020 wrote:Do you have a link to that? I'd like to see it...
You want the link for 703 or the one that I purchased? I dont have a link - I just have a file that was sent to me by the local distributor.
Soundman2020 wrote:There's also the issue of what you want to use it for: If you need it to absorb only high frequencies without doing much for lows, then you need a much higher density, probably around 60-80 kg/m3 for fiberglass, and maybe 90-120 kg/m3 for mineral wool. But if you want something that is better at absorbing down to very low frequencies, then you need a lower density. Maybe 20 kg/m3 (fiberglass) or 30 kg/m3 (mineral wool).
So if i understand correctly - i should first set up my room with speakers, measure them in a completely untreated state and then decide weather i need the more fluffy stuf or the more dense insulation, correct?
I have to admit - i didnt think through the insulation thing too much. I assumed I will be treating all the walls with insulation and then adding tuned or precise treatment for liveness and since the total cost of insulation was around 400 USD - I didnt stress too hard. Obviously, I was thinking about products that would be more effective in the lowest of frequency ranges. I can still return this product if it turns out to be a very bad purchase.
I would prefer if you had discussions of this depth on your own thread. Its getting to be a bit much..I appreciate that your just responding to Stuart. I don't mind questions about what's going on with my build of course, but this is a bit off topic.
I would prefer if you had discussions of this depth on your own thread. Its getting to be a bit much..I appreciate that your just responding to Stuart. I don't mind questions about what's going on with my build of course, but this is a bit off topic.
I'm trapped under bad weather for the moment, which will slow me down on finishing the back walls for a week or so. I need the outdoors for the sanding and cutting since my garage is full of materials. I'll be starting on the cloud after that liked we talked about.
So I'm wanting to know what the rest of March is looking like for you. I'm hoping for you can have the soffits ready for me to work on by the beginning of April.
With regards to the cloud, I need to know about the wall features behind the cloud. The boards over the sliders and the space over the speaker soffit. I asked already, but you may not have noticed. Do you see anything you want to change before I put the cloud in place? Can you guess at the change in the angle of attack? I May need to change the cloud dimensions so that it clears the walls.
Thanks
Got a break in the weather today!! So now I have a template and can whip up some more before sun down.....
