Originally Posted by dwales77
When you can spare some time:
1. What do you suggest for room treatment, mainly Front walls before the screen is fixed.
2. When buying a sealed sub..which one do I choose:HST18 Dual 1 ohm voice coils or HST18 Dual 2 ohm voice coils
for the front wall everyone just covers the entire wall with 1" linacoustic. This is nothing more than flexible duct board so you can also use rigid duct board like certainteed ultra duct black from your local hvac supply house. It's basically the 703 everyone uses including for side walls although I'd go at least 1.5" on side walls, 2" on back... Although 1.5 is OK there too. Check the manufacturers acoustic Info. You can Google" Bob golds acoustic " for a spread sheet of popular insulation and their acoustic properties to compare to. All of poplar materials are in the spreadsheet.
Be aware that it's not advisable to treat everything. Treat at least the first reflections from the front 3. If you can swing the extra cost and you have good off axis response (I haven't seen this for the 3677 although I imagine it's decent) then it's also a good idea to use some diffusion or combo panels on the sidewalls next to the mains, some alternate absorption,combo,absorption etc. Lots of info on the web and some of the better acoustic stores.
As for subs... I prefer vented... That's why I built 4 ht18 tuned to 17hz. I use a single inuke 3000 dsp and can hit reference without even getting close to clipping. With sealed you'll most likely end up having to boost the bottom and needed some serious power.
1 ohm vs 2 depends on how you want to hook them up. Remember there are two coils so with a 1 ohm you can have 2 ohms in series or .5 paralell. Most who want to get the most out of an inuke will run two ohms. 4 ohms however is easier on the amp and most any amp is happy with this load. In this case you may want 2 ohm coils so you can wire them in series for a 4 ohm load. What i did was take 1 ohm coils in series to give me two ohms per driver and then I wired 2 drivers in series for a four ohm load and I run two drivers per channel and the amp has a 4 ohm load per channel. If I ever want to get another amp I can run each at 2 ohms... but after getting mine setup I now know more power is something i definitely don't need. So as you see the coils you need really depend on what you want. FWIW it's easier to draw the above out on paper ..especially if wiring dual coils together with multiple drivers.
I have prices materials and pictures on my build thread in the link below.