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Hi guys --I just moved into a new house and the room that I'll be setting up my audio gear in is oddly-shaped. I'm assuming that the conventional optimum ratios for HxWxL won't work for this since it is not a rectangle. Any ideas on speaker placement and listening position? I can experiment with the subwoofer location, but would like ideas on Left and Right and listening position.
TIA!
Jeff
Follow Ups:
Jeff,I'd put the speakers on the right "c-d" wall facing to the left. That has two advantages: It makes the left and right sides symmetrical where you listen, and it puts the rear wall farther behind you which minimizes low frequency peaks and nulls due to comb filtering.
--Ethan
Looks surprisingly like my room apart from a bit of difference in the dimensions, door locations, and the fact that my corner at 'd' is cut off at a 45 degree angle.
My 'b-c' wall is shorter, my 'c-d' wall is longer, and my 'd-e' wall is less than half the length of the 'b-c' wall which makes things a fair bit different but if you want to try my approach, it works as follows:- regard the bcd back to opposite side rectangle as the listening area.
- do an Audio Physic style setup in that space with speakers along the 'bc' wall. Because 'cd' is longer for me, I can actually put the speakers out halfway between the 'bc' and 'de' walls and listen close to level with the 'de' wall which terminates behind my left shoulder. I'd still try listening against the 'de' wall but have the speakers closer to the bc wall - perhaps with driver centres 3' forward of the wall based on the rule of thirds for a start. Place them symmetrically in relation to side walls and they'll be a fair way in from each side wall. Work on something with the distance between the speakers just slightly wider than the speaker to listening point distance.
- You may need to put some form of absorption or diffusion in the corners in that alcove area at the back of the room where the door is because reflections from that area will unbalance the sound a bit.
- place the sub on the left hand side of the room in the diagram. I'd place it along the 'bc' wall otherwise it's going to be a lot further away than the mains and that can be an issue. Try a point along the wall pretty close to directly behind the left speaker.
Overall results can be improved considerably with some acoustic treatment but an Audio Physic style approach or another nearfield listening approach minimises the audibility of room influences which is a big help in an asymmetric room, and a long wall placement as described at least ensures that the speakers are in a symmetrical environment as far as the side walls and wall behind them goes.
David Aiken
Just leave Dave's rig where it is and everything will be fine!
Seriously... well a bit more seriously... I have heard Dave's room... you know what I mean... and after quite a lot of experimentation he has got a very good result from a less than perfect room.
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