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  1. #1

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    Default Lsi7 as rear surround -- left or right?

    This question is probably trivial, but I can't ease my curiosity... so here it is:

    The tweeter and woofer alignment on the Lsi's is off-axial. There is left or right assignment on the speakers which I believe it's for the main's.

    Now if I put them as rear surround, do I use left for SBL (surround back left) or SBR?

    In fact I can't really tell the difference when I switch left and right, but maybe there is a theoretical benefit for certain placement?

    I also noticed that most off-axis main channel speakers have the tweeters pointing in the screen. For surrond, they point forward. How about the rear's?

  2. #2

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    Since the rear surrounds are usually a mono signal, it shouldn't matter, but I would put them up with the tweeters on the outside for a more diffused sound field.

    Michael

    BTW - Welcome to Club Polk
    Mains.............Polk LSi15 (Cherry)
    Center............Polk LSiC (Crossover upgraded)
    Surrounds.......Polk LSi7 (Gloss Black - wood sides removed and crossovers upgraded)
    Subwoofers.....SVS 25-31 CS+ and PC+ (both 20hz tune)
    Pre\Pro...........NAD T163 (Modded with LM4562 opamps)
    Amplifier.........Cinepro 3k6 (6-channel, 500wpc@4ohms)

  3. #3

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    Quote Originally Posted by jome View Post
    This question is probably trivial, but I can't ease my curiosity... so here it is:

    The tweeter and woofer alignment on the Lsi's is off-axial. There is left or right assignment on the speakers which I believe it's for the main's.

    Now if I put them as rear surround, do I use left for SBL (surround back left) or SBR?

    In fact I can't really tell the difference when I switch left and right, but maybe there is a theoretical benefit for certain placement?

    I also noticed that most off-axis main channel speakers have the tweeters pointing in the screen. For surrond, they point forward. How about the rear's?
    You want them with the tweeters facing in. I have the LSI 7's as surround. This is from the manual...

    FIGURE 2
    Front & Rear speaker placement. Note tweeters face “in” for optimum imaging. LSi Loudspeakers
    are magnetically shielded for safe placement near TV or video monitors. If you notice video distortion
    or discoloration, immediately move the speakers away from the video source and call Polk
    Audio Customer Service.

  4. #4

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    Quote Originally Posted by Mick88 View Post
    You want them with the tweeters facing in. I have the LSI 7's as surround. This is from the manual...

    FIGURE 2
    Front & Rear speaker placement. Note tweeters face “in” for optimum imaging. LSi Loudspeakers
    are magnetically shielded for safe placement near TV or video monitors. If you notice video distortion
    or discoloration, immediately move the speakers away from the video source and call Polk
    Audio Customer Service.
    My manual (and the one posted on Polks site) says this on the first page under placement recommendations....

    If you are using your LSi Series Bookshelf Loudspeakers
    as rear channels in a home theater system, they should be placed on the rear or
    side walls, slightly above (and, on the side walls behind) the listening position
    [figures 4a & 4b]. In this case, the speaker marked “left” should be placed on
    the left side of the room as you face the back of the room [figure 2] (it becomes the right rear surround when you face the front of the room).
    I stick with my original recommendation.....

    Michael
    Mains.............Polk LSi15 (Cherry)
    Center............Polk LSiC (Crossover upgraded)
    Surrounds.......Polk LSi7 (Gloss Black - wood sides removed and crossovers upgraded)
    Subwoofers.....SVS 25-31 CS+ and PC+ (both 20hz tune)
    Pre\Pro...........NAD T163 (Modded with LM4562 opamps)
    Amplifier.........Cinepro 3k6 (6-channel, 500wpc@4ohms)

  5. #5

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    Thank you both for the information!

    After reading the manual and other online materials, my impression is that tweeters face in for stereo imaging while tweeters on the outside provide more diffuse sound field.

    That being said, I still found the difference unnoticeable. I'll see if I can find a better way to experiment a little bit and report back~

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