sub placement

stillen
stillen Posts: 43
edited July 2011 in Subwoofer Hookup & Bass Management
on the LSiM manual it shows sub placement cadi-corner where the middle of the sub is in the corner so the output goes into all the room ; fist time I have seen this how would it work.
Post edited by stillen on
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  • stillen
    stillen Posts: 43
    edited June 2011
    here it is on page 8

    http://www.polkaudio.com/downloads/manuals/home/LSiM_Manual.pdf
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  • 20hz
    20hz Posts: 636
    edited June 2011
    stillen wrote: »
    on the LSiM manual it shows sub placement cadi-corner where the middle of the sub is in the corner so the output goes into all the room ; fist time I have seen this how would it work.

    it took me years to find a nice sounding sub location , I have halls open areas that lead to kitchen etc , I actually had the sub cancelling itself , I finally placing the sub in the far cornor with the tv in front of it and the mains on each side to sound the very best , the sofa is like inline withthe hall but the bass amplifies going down the hall so sitting there nothing is missed , I bet the sub does not do my TV any good (vibrations) but I cant do a lot untill I get a lcd or plasma ( I got this big ole 52" backscreen proj type ) .
    PS: with a sub in the cornor you get a ?18db? gain thats like adding 2 more subs .
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  • stillen
    stillen Posts: 43
    edited June 2011
    ok thanx I am going to place like in the polk manual shpwed above or in the corner facing straight down the wall which is more typical.
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  • spaceman
    spaceman Posts: 138
    edited July 2011
    Yeah do not be afraid to move it around. another idea is to place the sub in a central location then move yourself around the room listening in different spots. You can often find a sweet spot this way.
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  • 20hz
    20hz Posts: 636
    edited July 2011
    I usually have my drivers up front so-as close to the ground on my last sub I had the drivers facing up 30" off the ground , well it still shakes the room .
    I now have a problem with a window close by , I dont know if the up facing sub makes it worse , as much as I would like to fill the window in I dont think the landlord would appreciate it :)
    I have tried all kinds of things to quiet it from foam to dynamat , any sugestions ???????????????????
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  • rtart
    rtart Posts: 832
    edited July 2011
    Ever heard of 'crawling for bass?' Put the sub in the location you usually sit, (move your sofa or chair if you need to) crank up some bass heavy source material, and crawl on the floor until you find a spot where the bass is strongest. Put your sub there.

    No, I'm not kidding. Before Audyssey and spectrum analyzers that's how we did it. I had a custom built subwoofer to reinforce the bass for my Dalquist DQ-10's in the 80's, and that's how I set it up.
    My 7.4.4 DIY 4k Home Theater:
    Polk LSiM 707 L-C-R, LSiM702 side surrounds, LSiM 705 rears
    Polk LSiM 702s x 4 on the Ceiling Atmos speakers
    2 x SVS PB12/Plus 2's
    Denon X3700H
    Emotiva XPA11 Gen 3
    XBox One X 4k & BD and streaming
    Panasonic UB-420 4k player
    HD-A35 HD DVD
    Oppo BD-103D for hirez audio
    Technics SL-D2 TT, Grado Gold Cartridge
    JVC DLA-RS2000/NX7 projector
    Silver Ticket 120" acoustically transparent screen
    Berkline 090 electric recliners with Aura Bass Shakers
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  • codyc1ark
    codyc1ark Posts: 2,532
    edited July 2011
    rtart wrote: »
    Ever heard of 'crawling for bass?' Put the sub in the location you usually sit, (move your sofa or chair if you need to) crank up some bass heavy source material, and crawl on the floor until you find a spot where the bass is strongest. Put your sub there.

    No, I'm not kidding. Before Audyssey and spectrum analyzers that's how we did it. I had a custom built subwoofer to reinforce the bass for my Dalquist DQ-10's in the 80's, and that's how I set it up.

    Before? I do it, even now! You have to do the crawl, placement with all speakers is very important.
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  • spaceman
    spaceman Posts: 138
    edited July 2011
    rtart wrote: »
    Ever heard of 'crawling for bass?' Put the sub in the location you usually sit, (move your sofa or chair if you need to) crank up some bass heavy source material, and crawl on the floor until you find a spot where the bass is strongest. Put your sub there.

    No, I'm not kidding. Before Audyssey and spectrum analyzers that's how we did it. I had a custom built subwoofer to reinforce the bass for my Dalquist DQ-10's in the 80's, and that's how I set it up.

    It is not just the strongest place though right? You also want tune fullness. Not just max boom factor.

    Yeah that works. I have a really weird room and I am still moving it around. I will find a good spot, set things up and then I hear a rattle or a resonance I did not hear before. Sigh. I want to use dynamat as wallpaper at this point.
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  • Polkie2009
    Polkie2009 Posts: 3,834
    edited July 2011
    Lol,spaceman. That will be some expensive wallpaper!
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