Steve's First Dedicated Theater - Page 6 - AVS Forum | Home Theater Discussions And Reviews
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post #151 of 156 Old 09-23-2017, 07:14 PM
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Quote:
Originally Posted by SteveCallas View Post
So I'm about to build four new SI HT18 LLTs to go along with my existing two AA Avalanche 18 LLTs in my dedicated theater room. Approximately 22 effective cubic feet each, tuned to 12-13hz, 8" diameter ports with 13" flares. The new subs will be in the front of the room and at least two have to be front firing. The existing subs will move to the back of the room, and they are both downfiring.

Two of the subs ( green) will lay on the floor underneath the screen with the ports firing out to the sides and the drivers in close to the center.

My question is, if I know my room height, the location of where the subs will go, and my primary listening position, can I figure out how high to place the drivers on the front baffle of the other two subs that will go behind the screen (blue) so as to minimize cancellation at my seat? Would this be a crapshoot or is there a calculator I can use?

I have a lot of flexibility on the design of the other two subs. They can be down firing, front firing, drivers up high with ports downfiring, drivers down low with ports upfiring, etc.

If there is no calculator, I'm assuming it is best to try and excite as many different room nodes as possible, so if the other four subs already have the drivers down low, these last two should have the drivers up high, yes?

Steve, download the new RoomEQ wizard, it has a drag and drop room mode simulator built in.




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post #152 of 156 Old 10-04-2017, 06:11 PM - Thread Starter
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Thanks Michael, that is very helpful - I spent a lot of time playing with it.

Subwoofer construction begins this weekend.

I finished a few more space themed acoustic panels for the windows. Have I mentioned how much of a pain they are?
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post #153 of 156 Old 10-15-2017, 12:26 PM - Thread Starter
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The remainder of the space-themed absorption panels are up, and while I personally like the subject matter and think it will go nicely with the eventual fiber optic star ceiling, I can't help but admit the theater lacks the sophistication of the rest of the house. Don't get me wrong, it's incredibly cozy and the AV performance is everything I hoped for, but next time around, I will definitely pursue the wainscoting and column look.

Sub construction has been delayed because I can't find the time to pick up the CNC cut MDF pieces. When the subs are in place below the screen, covered in black velvet, and you can't see cinder blocks anymore, lol, that will help clean things up a bit =)
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post #154 of 156 Old 10-15-2017, 03:18 PM
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It is easy to do now with minimal mess and impact......now as in the room is ready when you are, not as in immediately.....




Link to budget Home Theater build

http://www.avsforum.com/forum/19-ded...i-version.html
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post #155 of 156 Old 10-15-2017, 08:29 PM - Thread Starter
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I temporarily tacked up some black felt under the bottom of the screen until the black velvet subwoofers are done and it definitely improves the aesthetic. Some Orff O Fortuna in 9.2.4 DTS Neo X before bed and a panoramic picture from the riser.
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post #156 of 156 Old 10-15-2017, 10:08 PM
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That looks super nice in my book !!!!!

Link to budget Home Theater build

http://www.avsforum.com/forum/19-ded...i-version.html
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