LSi15 woofer out of phase

chamont
chamont Posts: 22
edited October 2012 in Speakers
So, I just realized something.

As I'm looking at the schematics of the LSi15, the woofer is out of phase (+ and - are "reversed"). I'm sure this is a design feature, but it seems really strange to me.

Has anyone tried reversing the polarity on the woofer to get bigger bass from it? And how has that worked out? I don't really want to be the guinea pig here. :)

Anyone? Thanks.
Monty
Post edited by chamont on
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Comments

  • Face
    Face Posts: 14,340
    edited October 2012
    Do you believe Polk intentionally wired to woofer out of phase to give you less bass? :mrgreen:

    Certain crossover topologies require a driver(or drivers) to be wired out of phase for flat response at x-over points, otherwise there would be a peak or null at the crossover point.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • chamont
    chamont Posts: 22
    edited October 2012
    Ha, well, good question. Probably not. I'm not a speaker designer, so I really have no clue. It seemed strange, that's all. I'll quit worrying about it.
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  • tonyb
    tonyb Posts: 33,008
    edited October 2012
    Is there a reason your wanting more bass from the lsi's ? What are you driving them with now ? Do you have a sub in the mix and if so what are they crossed over at ?
    HT SYSTEM-
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    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

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    Sonos zp90
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  • chamont
    chamont Posts: 22
    edited October 2012
    You guys are too cool. I think I had the same problem 99% of lsi15 owners have. Power.

    I've gone from a POS Sony receiver, to a Rotel 100x5 amp, to an Outlaw 7500, to a bi-amped setup (with custom crossovers), to finally, now, a pair of Emotiva XPA-1 monoblocks (500W 8ohms, 1kw 4ohm). FINALLY. Finally, the bass is great. LSi15s are, as has been said a million times, just a humungous load for an amp.
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