First of all, I would like to introduce myself. I am Zoltan, a middle aged, diy and movie enthusiastic guy from Hungary (Middle Europe
After years of lurking, reading and salvaging info from this absolute top-notch forum, the time has arrived for me as well, when I can build my dedicated home theater room in my house's basement.
I have now a temporary movie room on my first floor with the following AV equipment (See the next comment.):
Old equipment list:
Ampifier : Pioner VSX-923 7.2
Projector: Optoma HD33
Screen: 100" EliteScreen
Speakers: 5.1 Klipsch
New equipment list, updated on 20.12.2019
Receiver: Denon avr-x4500h
Projector: Digital Projection dVision 35 WQXGA (2560x1600)
Screen: 146” Screenline, Microperforated – F.P. – gain 1.0
LCR: 3 * S-2000 (C-115-PLF)
Surround: 10 * SR-12-N (THX)
Sub: Behringer NX3000D - 2 * C-218-A (THX)
Klotz cables, xlr
My plan is to diy build a dedicated room in my basement, move and use the current equipment in the first phase.
Then in the second one, I would like to upgrade the AV stuff to 7.2.4 atmos system, the 100" screen to 110 or 120" if it is possible and the amplifier to one with 4K and atmos support.
The would-be room is a bare room with walls, floor and ceiling made of cement and ceramic bricks with depth of 36-40 cm. See the next comment.
Here I would like to apologize for using metric measurement system, in Hungary the inches and feet are totally non existent and unfamiliar, only heard about in Hollywood blockbusters !
Thus, please forgive me my ignorance, hopefully it will not cause too much inconvenience for You!
The basement room has got the following dimensions without any touch of treatment:
Width: 410 cm, length: 650 cm and height: 236 cm
Due to some piping on the walls and the room in room wood framing with osb and drywall layers, the new available net dimensions for the room will be approximately as follows:
Width: 374 cm, length: 612 cm and height: 230 cm
I created a preliminary sketch with Sketchup for your verification. This includes the would-be 7.2.4 speaker system, 120" screen, two rows of couches with the far one on a riser.
There are some basic acoustical treatments as bass traps and some absorbers.
Firstly, I need your help with the basic concept with spacing and locations for things. I attached two screenshot for the 2 projectors with the throw distances, sizes and light outputs as a proof of concept.
Please, back me up with the speaker locations, seating position and the rightness in general about my idea.
Unfortunately, the brutto height is 236 cm right now. I plan to use on the ceiling 5 cm of rockwool of the densest type (Rockwool Airrock XD with 90kg/m3) between 2 cm height rubber mounts and 3 cm of lath on which 12 mm of drywall as covering.
On the floor, my plan is to use some rubber carpet with 2-3 mm thickness, plus carpet.
So I need your expert advise how can I insulate floor and ceiling with the max available height ?!
The max height for the riser would be 30 cm under the couch, with a mini riser around it with 18 cm height (15 cm board and 2 osb layer 3 cm)
On the side walls I plan to use wooden framing made of 5x10 boards with some fluffy rockwool insulation in between. Inside is 15 mm OSB as first layer and 12 mm Blue rigips (special drywall for sound proofing in Hungary or in Europe) drywall second layer, then some acoustical treatment and finally some A/T material on frames.
The equipment rack will be outside of the room itself. What can't be modified is the locations of the doors, the height of the room and the location of the air conditioner, radiator and the ventilation.
Because the build is not started yet, I am open to any advise, recommendation from You.
I will attach some shots of the would be room in the next comments.
I am looking for any comment and advise.
Thank You any and all piece of info in advance !