Originally Posted by DonH50
Note that acoustic treatments are generally ineffective in the subwoofer region so there are really two issues: finding the best spot for the sub, and finding the most appropriate places for room treatment for the mains. Placing room treatments can be tricky as it depends on your room and everything in it, the dispersion characteristics of your speakers, your preference for sound, your budget, etc. That said as
said there are lots of online resources and companies that sell product such as GIK and RealTraps offer help. I'd contact a couple or three of them, see what they say, then start slowly as you add treatment to the room.
FWIWFM - Don
First, thank you to everyone for the replies. I just recalibrated my Anthem ARC receiver and I still can't believe that 2 more powerful subwoofers will not be more overpowering than the one 15 I have now. I've changed my mind about smaller (15inch) sealed to 18 inch, to ported, back to 15 inch sealed... many times. Going a little crazy. 95% Going with the 15 sealed. Still pondering. A lot of stuff has to go together along with the subs.
I agree with DonH50. Acoustic treatments are hardest for the sub levels. Especially under 50 or so. My room has 20Hz peaks and 40s and 60? 70s?... etc... depending on what your looking at. I was planning on placing panels at the early reflections on either side. The bass "traps" portion was up in the air. I can easily build the corner trap 30" wide triangle or whatever and place one in each corner, but I don't think they will go low enough for my needs. I was also thinking of building a very large, 7' X 8' rectangle and place it directly behind that curtain there. It can be 8 or 10" thick. All built out of 703 or whatever is best. Then the corner traps or just thick panels on the sides. My ultimate goal would be, and this is why I want a pro to come in and advise and measure for me, building a super-low bass absorber(s) and place them in the corners behind the L&R speakers. Diaphragmatic from Acoustic Fields website. I would hate to have to buy them, as they are pricey, so if I could build them with the plans they have, it would be a better option. Those do go down to very low levels.
I do need to start with the subs first. Position them, then start with the acoustic treatments, then do the ARC or sub correction/ARC correction.
I didn't realize Accucal was on this website. I may just PM him as it looks like they come around my area in November. I do trust they will do a good job. I certainly have hired "professionsls" who were far from professional, but in this case, it seems fine. I would love to get a local guy, but then it's hit or miss, unless they come recommended or something. At some point I have to get/learn REW but not right now. I envy everyone who does it. Sincerely.
Next couple of weeks are busy, but I will be calling Rythmik at some point to ask questions and probably order something. I do still have the question regarding the SE15HP2 sub vs the F18 sub. Which is the better option, in case I can fit them both in my space? Is there that much of a difference? Again, my first priority is the most accurate, clean, coherent sound for music. I will sacrifice the deepest lows in exchange for that extra 5% of the aforementioned, if that's the case. Yes, it's a 5.1 system, but I don't want the bass to overpower everything else. I want the subs to disappear, really.