Polk Lsim 702 FX set up help

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Dabutcher
Dabutcher Posts: 2,591
I just bought four speakers for side and rear surround duty. My room is approximately 12’ wide by 35’ long. I cannot mount rear wall because of long distance away. These are directional speakers. I was thinking two at sides in front of seating and two behind? But set up says four behind seating. Or should I just return or sell two and go 5.1?
Any and all help would be greatly appreciated.
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MIT Magnum MH-750, Monster HTS 5100MKII, Sony 77" Class - A80CJ Series - 4K UHD OLED,PS4, Def Tech 15” sub,LSIM 706c, Sunfire Signature Grand 425 x 4,Parasound hca 120, LSiM 702 x 4, Oppo 103D, SDA SRS 1.2, Pioneer Elite SC63 , Pioneer Elite BDP-05 “Why did you get married if you wanted big speakers?”

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  • Emlyn
    Emlyn Posts: 4,372
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    I would try a pair on the back wall and run auto calibration as a test anyway. If that doesn’t work out with good results a 5.1 system would be fine.
  • jeremymarcinko
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    If it were me I’d go one pair inline with the seating and one behind maybe 6ft.
    Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant
  • shs
    shs Posts: 105
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    Because of the angle with which the tweeter and midrange fire, the 702s should be placed either slightly ahead or slightly behind the MLP(s). I have mine slightly ahead of my MLP and it fires back at that location and the 2nd row behind the MLPs.
    SONY VPL-VW385ES, Da-Lite 92" 0.9 HD progressive 16x9 screen, Apple TV 4K, Oppo UDP 203, Anthem AVM 60, D-Sonic 4000 (800x3, 400x4) for bed layer, 2 Crown XLS 1002 (225x4) for Atmos; Speakers: Polk LSiM 705s, 703 front, 4 702F/X surround, 4 Polk TL3 (Atmos), Velodyne DD15 Subwoofer.
  • aboroth00
    aboroth00 Posts: 1,103
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    Experiment! Put them on some boxes and try them out in different configurations. If you can go 7 ch then I'd advise doing it. Having the seamless transition from side to rear surround creates a more immersion.

    As a rule of thumb, you lose 6db when you double the distance.
    2Ch Tube Audio Convert
  • daboyz
    daboyz Posts: 5,206
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    What if they were basically even or slightly behind the listening area? I've got Lsi7's there now.
  • shs
    shs Posts: 105
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    The thing to remember about the app 702s is the the midrange and tweeter fire at a ~45° angle and so if they are even with the listening area then the listener will be 45° off-axis relative to the tweeter and all of the higher frequencies will be diminished. The LSi7s fire straight ahead so they are fine even with the listening area.
    SONY VPL-VW385ES, Da-Lite 92" 0.9 HD progressive 16x9 screen, Apple TV 4K, Oppo UDP 203, Anthem AVM 60, D-Sonic 4000 (800x3, 400x4) for bed layer, 2 Crown XLS 1002 (225x4) for Atmos; Speakers: Polk LSiM 705s, 703 front, 4 702F/X surround, 4 Polk TL3 (Atmos), Velodyne DD15 Subwoofer.