Kinetic River Cinema - Page 11

Now some pictures.

Dont know if anyone is following this thread but the lack of pictures is getting out of control. More interesting things coming soon.

This will keep me busy all weekend; all 212 of them


I also got my return done for the most part.
This is the adjacent rooms soffit used to get the return back to the furnace



And the return in the theater. Still have to run the flex to the back of the room

Edited by fax6202 - 8/8/12 at 5:16pm

One down......Four to go

Indeed. I think I am going to go OSB+Drywall, instead of DD. Had a chat with John and Ted and wont lose any noticeable soundproofing going in this direction.

19/32 OSB and 5/8 drywall

Took off from work an hour early, got home and worked for about 4.5 hours and.......Clips and Channel are done!

After the ceiling was done it went fairly fast. Once I had the back wall done I just used the laser level and it went flying by.

Thanks Nick

Tim-

Definitely did not want to be forced to hit the channel for all of the soffits. I didnt feel comfortable with just DD holding up the soffits and columns..

good idea. I will definitely do that.

I have to say, once the ceiling was done w/ having to measure non-stop; the walls flew by using my laser level.

Ok, thanks Ted. I think I will probably do a little of both. More screws and some of those screws into the channel.

The latest on the IB riser project....below are some thoughts from the IB forum......

You're going to implement a riser enclosed sub, and integrate it into a Triad based system in a 3k cube room. The 89dB sensitivity LCR's have a double 6.5" MTM config, accompanied by a 500watt 12" sub. A nice system however clearly the need for more bottom end is apparent;.... enter the riser sub.

To really achieve the full benefits of an IB alignment (responsiveness, ULF sensitivity, absence of latent/reflected energy) the baffle and backspace enclosing the rear-wave of the drivers needs to be acoustically infinitely large. Or, ideally as large as possible perhaps as large as the listening space itself. The rear wave of the driver needs to be free from the typical air compression effects that are associated with typical small sealed subwoofers.

Now with your riser, I'm not convinced your backspace is big enough to fully benefit from an IB alignment. That doesn't mean this approach is a bad idea. You can still make the backspace as large as possible, kind of a quasi-IB, and likely EQ in the remaining shaping. There are significant caveats though. Typical IB drivers don't have big magnetic motors, and placing them into undersized enclosures and EQ'ing in the difference could become problematic. A full size driver motor, optimized for normal sealed use may be a better option, but I don't know.

After you no for certain the internal volume of the riser cavity that each driver will see acoustically, then you can make that determination. Also, enclosures that large in any one direction can elicit internal reflections/resonances, so properly damped areas with batting/insulation would be in order. This project is not a trivial, typical DIY effort. It's doable,.. certainly, but success will depend on extensive planning, and precise execution.

Now once built and operational, the optimizing process begins. This, as Thomas pointed out, will pose obstacles as well. Thomas suggested the sub be used as a midbass module, keeping the deep stuff out of it and allowing the riser sub(s) to cover that range. This retains upper bass and the associated imaging cues up front and tied to the LCR's. You may find another 12" sub up front would help, but I don't know. Perhaps, if you high pass the 12", it could have the impact and response needed. Placement would be key, as you'd be limited to essentially right up front and center, and if nulls are encountered in it's range (common), it's got little help.

The mains, at 89dB, and single 500 watt 12" sub, definitely need some augmentation as high up as localization will allow. This determination of crossover frequency, unfortunately, will need to be performed after the fact. There's all sorts of opinion, but each room is different, and you're just going to need to experiment upon completion.

Works for me, makes life easier.

On another note....DRYWALL in the rest of the basement. The wife is on me about finishing the rest of the basement so I took off the next two days and bribed my brother and two buddies to come over and hang drywall, then finish. I was originally subbing it out, but the guy called today and said it would be another 4 weeks. Tired of waiting I am just going to bite the bullet and do it myself.

Here we go......

I have done quite a bit of drywall, just not close to the scale of what is waiting for me. Fortunately my brother can finish as well. But yes, it will take me some time to finish. But there will be 4 of us, hopefully a fifth w/ my dad joining the fray. We are also borrowing a bazooka and heaters.

NADDA on the hvac. But...I have access to do anything i need to even after the drywall in the rest of the basement goes up. at first I thought that wasnt going to be possible but now it is. Just had to do a little rearranging.

I am starting to fold on this venture. I may take the safe route and go with a second or maybe third sub in the future.

My wife's 18' x 13' x 8' walk in closet is finished. This is a surprise, she has no idea that I am building this room out for her; I mean where else is she going to put her 200 pairs of shoes (not joking at that number).....closet, bathroom, and two rooms to go!

14 hour day today. Six of us got all the drywall hung, everything but the inside corners taped. More mud tomorrow, skim coat Saturday, sand on Sunday. Here is how everything went down......I decided to sub this portion out, and then the contractor who is also someone I know fairly well had to postpone for a month. So I decided to just do it myself. But then my brother, dad, and three buddies decided to lend a hand. None of us does this for a living, but we are all very handy and some of us have worked in various trades in college and when younger.

Today went great....we got a ton finished. The sooner I can get all this done the better. I really want to devote my time to the HT.

Will post some pics when my camera gets charged. Nothing exciting at all just another room w/ drywall. This is more for my own documentation of the entire project.