Check this system out. Mike gives a link to an article relating his experience building his room. It should prove informative.
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What is the plan? Do a short or long wall setup? Will you be using this for 2ch listening or HT use as well?
If 'all new' construction, investigate audio oriented building materials and techniques. Staggering studs is a good idea to decouple inner and outer walls. Weaving a hi-density acoustic material BETWEEN the studs helps lots.
Pre wire? absolutely! 1 or 2 exclusive circuits and maybe even a sub panel for power. Cable TV? Pre wire that, too. Between the new listening room and the rest of the house, consider an Exterior door. Non-parellel walls/floor/ceiling are certainly a good idea to reduce standing wave propagation. Taper all walls differently. I have seen a recording studio made with this in mind.
Windows? Double glazed vinyl probably. Low -E-. If designing for HT, place appropriately and consider where the sun would come in.
Think about where you intend to sit and HOW MANY people. It is a bad idea to sit mid-way of any dimension. I Personally don't like sitting up against walls, but I have seen some advocates of that position.
The dimensions you have chosen are 'perfect' golden section numbers. My plans are similiar except I added a 2'deep by 7' wide by 5'high 'alcove' for the placement of a RPTV since I intend to ultimately have a 5.1 HT oriented system. I was planning a long-wall setup, with the listeners about 3 feet or so from the BACK wall, leaving an isle and providing some ambient space.
Also, please consider BOOK SHELVES as both a design and acoustic element.
Thanks Timrhu and Magfan,
I will be using this room as a dedicated 2ch listening only.. I already have a dedicated movie room, happy with that:). Listening position will be facing short side, unless long side proves better. Have to wait and see:)
I already have two listening rooms in my home, one in basement and one in dining room. Each room has its benefits and bad qualities. But would love to experience the best possible room dimensions.
I've used the same equipment in about 6 different rooms in different homes, and for sure the rooms and speaker placement make such a difference, way more than any component I ever tried.