Speaker Placement

Discussion in 'Home Cinema Building DIY' started by Dancook, Apr 7, 2017.

  1. Dancook

    Dancook
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    I think I'm finally narrowing down what I want, this is all to scale, except the speakers are IN wall not on wall and don't stick out quite like they do in diagram.

    7.8m x 4.5m room
    120inch wide 2.35:1 screen

    Kef CI 5160RL THX x 3 (front)
    Kef CI 200RR THX x 4 (atmos ceiling)
    Kef CI 200QL x 4 (surround)

    Considering the shape of the room, and that speakers should ideally be ear height where possible, I'm not sure there's much scope for me to go wrong. Maybe the L/R are too close to the side wall?

    I'd appreciate any suggestions for improvements

    speaker_placement_1.jpg speaker_placement_2.jpg speaker_placement_3.jpg speaker_placement_4.jpg
    speaker_placement_5.jpg
     
    Last edited: Apr 7, 2017
  2. Kev Greenhalgh

    Kev Greenhalgh
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    This is more of an observation than an "expert" opinion ;), but if you could bring the F L+R cabs in by 6", then toe them in slightly. Or would that narrow the soundfield too much?
     
  3. Harkon321

    Harkon321
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    Looks great. I'm just really jealous of the space you've got.
     
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  4. Dancook

    Dancook
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    Perhaps!

    Whenever I read about these speakers, they don't seem to be very directional anyway.

    The marketing on the 200QL says

    "Featuring KEF's sophisticated 'sit anywhere' Uni-Q driver array, which places the tweeter in the acoustic centre of the bass/midrange cone, this allows both the tweeter and woofer to act as a single point source that disperses the sound widely and evenly throughout the room."
     
  5. Kev Greenhalgh

    Kev Greenhalgh
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    Just been reading through the specs for the KEFs and toeing in isn't necessary, or they've been designed without that in mind. They seem to be much less "fussy" in relation to other conventional loudspeakers. :)

    If they do have a wide soundfield, then bringing them in closer to the screen will reduce acoustic rebound from the side walls. The only problem is once they're in, they're in for good.
     
  6. Dancook

    Dancook
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    I've gone with the current arrangement to avoid spending money on a larger acoustic transparent screen.

    But the screen away from the wall, so blocking some diagonal sound I guess, how much further from the wall it is unknown until I know how much ceiling height there is in the new roof space.

    Do you think the screen not being acoustic will present a problem for this? maybe as long as they are a couple of inches to the side.. it'll not be present a noticeable problem.
     
  7. Kev Greenhalgh

    Kev Greenhalgh
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    I don't think it'll make a difference at all. There's certainly more qualified AVF gang out there to offer a definitive answer though.

    Just so I can have a nosey around the interwebs, which screen have you decided on?
     
  8. Dancook

    Dancook
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    Not yet decided on, originally was looking at acoustic transparent screens - but need to bring the cost of the entire setup down a little - having a trap door isn't cheap, but I'm still balancing all the equipment costs.

    Having CI-3160 surrounds was a luxury which I had to change my mind on :D and now researching between Arcam AVR550 vs Anthem MRX1120
     
  9. Kev Greenhalgh

    Kev Greenhalgh
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  10. Dancook

    Dancook
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