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Can I preface this by saying I've never owned a television in my life...so please excuse my ignorance :)
I'm building my own home as an owner builder in Brisbane.
I have allowed for a dedicated home theatre / listening room. The steel frames are about to go up so I figured now was a good time to start planning.
It will be approx 6m x 4.3m. I'm hoping for a row of 5 seats at the back on a raised platform and then two x two seats as per the attached image.
I'm hoping for a 140" projector screen that I will make.
I got a bit excited, and have been buying speakers and an AV receiver over the xmas break. So far, I've bought
Denon AVC-X8500H receiver
2 x PMC twenty.25 floorstanders
2 x PMC twenty.23 floorstanders
2 x ELAC BS244 bookshelf speakers
1 x SVS PB3000 subwoofer
I'm hoping for both a high quality music listening experience as well as full Dolby Atmos.
I've been offered a good price on a pair of PMC twenty5.21 bookshelf speakers as well as a PMC Twenty5.C centre speaker.
The floor of the cinema is 200mm thick concrete suspended about 2m in the air.
The wall frames will be bluescope steel frames.
I'm hoping for great accoustics in the room as well as great soundproofing so that very little noise escapes the room.
I have a few general questions
1. Soundproofing - Once the steel frames go in, I was going to green glue a layer of plasterboard onto them. I was then going to construct a new set of timber frames internally and green glue two layers of plasterboard onto this. This will give separation between the two walls. There is a floor to ceiling window, but it is triple glazed and thermally broken. I will then make some heavy curtains to hang floor to ceiling around the room. I will then have a drop ceiling with stary night lighting. Does this sound like it will be sufficient to keep the noise from escaping ? Any suggested improvements.
2. Room size and shape - As I am building internal walls, I have great flexibilty over the shape and size of the room. It there a suggested size that I should make the room to minimise standing waves and improve the accoustics ?
3. Speaker placement and dolby atmos choice - I've looked into the Dolby Atmos setup guides. I suspect the room is too small for 6 ceilings, so was going to go with Atmos 7.2.4. Is this the best choice for the room size ? I'm guessing the twenty.25 should be front left and right and the twenty.23 should be back left and right ? If I get a second subwoofer, will the PB1000 or 2000 suffice or should I get another 3000? Will mixing the ELAC speakers with the PMC be ok or should I buy the PMC bookshelves ? How important is it to get high quality ceiling speakers ? I'm assuming that the dont have to be PMC as they are really only used for limited sections of the movie sound ?
4. Accoustic treatment - I have a company that produces stretched canvas prints for artists and photographers. I was thinking of printing movie style posters and then stretching them over 50mm deep frames and filling the back with accoustic foam. Is this likely to work ? The canvas is cotton.
My post is long and there are a lots of questions. I would appreciate any input about anything that you have to offer. Thank you in advance.
By Tone Malone
I'm happy with my stereo set-up but think it's time to focus more on what I can do to improve the room acoustics. A diagram showing my room layout is below.
I realise the speakers are too close to the wall and my sitting position is too close to the back wall, but it's a fairly compact place and it is a "family room". The speakers are standmounts on a very solid entertainment unit. We have wooden floorboards, hard walls/ceiling etc.
I would describe the sound as precise and the bass is punchy, but I suspect the room is making the upper-mids a bit harder than they should be ... the overall sound could be a bit more cohesive and "well rounded", with a better soundstage.
Things I would be able to do:
* Add tasteful(!) wall (and maybe roof) treatments
* Add mini stands under the speakers
* *Maybe* put the speakers on separate stands and move them further apart.
Things I can't do:
* Re-arrange the room layout significantly (if I can move anything, it might be by a centremetres)
* Move the speakers further away from the wall (this has been attempted a couple of times but they mysteriously move back)
* Turn the room into a shrine for black foam.
Based on the diagram, could anyone suggest room treatments and where I might position them (understanding I'll need to experiment a bit).
Any suggestions that keep this enterprise to a three-figure budget also greatly appreciated.
Item: Acoustic Bass Traps x 4
Location: Victoria (Dandenong Ranges)
Item Condition: Great condition(some scruff marks on the wood)
Reason for selling: not in use
Payment Method: Pickup - Cash, COD, bank transfer
Extra Info: Canvas wrapped, wood frame and filled with Acoustisorb 3. There is a small difference in the thickness/shape of the bass traps, but you don't notice this when stacked in the corners. These were much more expensive when I purchased them second hand, so they are heavily discounted. Excellent built quality and they look great. Happy to deliver anywhere in Melbourne metro area but can't ship these interstate.