Members Mind Riot Posted March 15, 2007 Members Share Posted March 15, 2007 They're in Santa Fe Springs, which is reasonably local. I wonder if they deliver? I don't know about delivering, but they certainly ship to anywhere in the states. When I ordered from them before they had three or more big centers in the states, one in socal, one on the east coast somewhere and one somewhere in the southern midwest, so they had three distribution centers. Link to comment Share on other sites More sharing options...
Members Mind Riot Posted March 15, 2007 Members Share Posted March 15, 2007 I know mineral wool doesnt hold its shape as well as 703 but how big is the difference really? It seems to still come in sheets... do the sheet fall apart into fluff or are they just droopier? Would the mineral wool compact over time in a vertical panel so that the top space was just empty once it settled vs 703 staying true to rectangular form over time or is the difference not really that much? Just curious because it seems 703 has a reputation of being "easier to work with" but if you only have to deal with it once when you are putting it in a frame of some sorts, is it really that much better than finding equivalent mineral wool? The thing is that 'mineral wool' as a term doesn't really carry any connotation of stiffness or rigidity. It's just a fiber, just like fiberglass, and can be made into many different shapes and densities and stiffnesses, just like fiberglass. For what it's worth, the panels I linked to from McMaster that I used to do my room were stiff enough to stand up on their own. I can't say how they would hold up without a frame over a period of years because I framed mine, but they were pretty stout. Link to comment Share on other sites More sharing options...
Members Mind Riot Posted March 15, 2007 Members Share Posted March 15, 2007 I just recieved my order today. for 266 dollars I got 20 sheets of 2' x 4' x 2" and 10 sheets of 2' x 4' x 1". still not sure what shipping was. I think it was 60. make sure you specify having the delivery made to a residence (not a business) or you'll be charged an extra 60 dollars if a delivery is attempted by fed ex freight when you are not at home./jonny Good to know, that's certainly something to bear in mind. Let us know how your acoustic treatments turn out! Link to comment Share on other sites More sharing options...
Members Mind Riot Posted March 15, 2007 Members Share Posted March 15, 2007 I'm gonna answer this 'Ethan style' like I used to. Not so much. The 703 will be plenty for mids and highs and first reflections. The increased density of 705 or similar materials is more important for bass traps. Not exactly the same, but either is perfectly adequate. Once you start getting up into the higher densities of fiberglass and mineral wool you'll start to get some reflection of the highs as opposed to absorption. But the differences between 705 and 703 for this application (mid and high treatment, first reflections) will be very small. Also, if you space the panel away from the wall a couple inches, the air space behind it will help it to absorb to lower frequencies. More bass trapping is always a good thing, but the benefit of using a denser fiberglass at first reflection points is pretty minimal. That being said, if you get a deal buying the 705 or equivalent in bulk and have a lot of it, either will do the job just fine. Yes, facing the paper side into the room will make it more effective at absorbing bass frequencies. This is because the paper will vibrate in sympathy with the bass frequencies in the room, and then that vibration will be damped by the fiberglass. Meaning a bit more acoustic energy absorbed. Yes. Not really. Your bass traps in the corners will do you the most good there. Yes, but spaced off the walls by a couple inches if at all possible. Link to comment Share on other sites More sharing options...
Members myfipie Posted March 15, 2007 Members Share Posted March 15, 2007 >Once you start getting up into the higher densities of fiberglass and mineral wool you'll start to get some reflection of the highs as opposed to absorption. But the differences between 705 and 703 for this application (mid and high treatment, first reflections) will be very small. Also, if you space the panel away from the wall a couple inches, the air space behind it will help it to absorb to lower frequencies. Take a look at our lab reports. Not only will spacing help with the lower end, but will absorb more high end due to sound coming in from the sides, hitting the back and then he back of the panel. Glenn Link to comment Share on other sites More sharing options...
Members myfipie Posted March 15, 2007 Members Share Posted March 15, 2007 found this link talking about differnt things to use. http://messageboard.tapeop.com/viewtopic.php?t=38571&postdays=0&postorder=asc&&start=0 Glenn Link to comment Share on other sites More sharing options...
Members Ethan Winer Posted March 15, 2007 Members Share Posted March 15, 2007 I'm gonna answer this 'Ethan style' like I used to. LOL, and a fine job you did too! --Ethan Link to comment Share on other sites More sharing options...
Members ElectricImages Posted March 15, 2007 Members Share Posted March 15, 2007 Thanks for the reply, that was really clear and helpful . Link to comment Share on other sites More sharing options...
Members Majoria Posted March 15, 2007 Author Members Share Posted March 15, 2007 Ok, I found that SPI does stock 703 and in three different forms: plain, FSK, and ASJ. They also have mineral board. I read Ethan's web site and I see the 703 and 705 FRK but nothing on accoustical treatment of 703 plain vs RSK vs ASJ. If I'm just trying to make a portable vocal booth, is the plain sufficient? Or do I go with RSK with the foil on the outside? Prices that I was given today:703 no facing - $1.06 per linear foot, $8.83 per pieceFSK - $1.58 per linear foot, $12.65 per pieceASJ - $13.71 per piece Mineral board2 Link to comment Share on other sites More sharing options...
Members mrbrown49 Posted March 15, 2007 Members Share Posted March 15, 2007 703 is fine. Link to comment Share on other sites More sharing options...
Members Mind Riot Posted March 16, 2007 Members Share Posted March 16, 2007 Take a look at our lab reports. Not only will spacing help with the lower end, but will absorb more high end due to sound coming in from the sides, hitting the back and then he back of the panel. Glenn Right-o. I neglected to mention that added benefit. Link to comment Share on other sites More sharing options...
Members Mind Riot Posted March 16, 2007 Members Share Posted March 16, 2007 LOL, and a fine job you did too! --Ethan I haven't forgotten it all! Link to comment Share on other sites More sharing options...
Members Majoria Posted March 16, 2007 Author Members Share Posted March 16, 2007 703 is fine. Which one? 703 plain? 703 FSK? 703 ASJ? Link to comment Share on other sites More sharing options...
Members mrbrown49 Posted March 16, 2007 Members Share Posted March 16, 2007 plain would be fine. I think this is a situation where you don't want the highs reflected back. Link to comment Share on other sites More sharing options...
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