Lsic

mwk455
mwk455 Posts: 219
edited May 2012 in Troubleshooting
I got a lsic for a good price . But it seems to have mid range come from only one speaker in front and bass from the other. Never heard this speaker before . Is that how its suppose to be?
Post edited by mwk455 on
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  • Denon Frank
    Denon Frank Posts: 130
    edited May 2012
    Yes. Those two speakers are have different x-overs. Check it out on the spec page. Lots of discussion found by searching for it.
    http://www.polkaudio.com/homeaudio/lsi/specs.php#center
    Frank

    Polk LSiM 703 mains on Skylan Stands
    Polk LSiM 704c center
    Polk FX500i surrounds
    Parasound 5250 Amp
    Oppo BDP-105 :smile:
    SVS PC Ultra tuned to 16hz
    Panasonic 65" Viera Plasma
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  • dekuda
    dekuda Posts: 756
    edited May 2012
    Denon Frank wrote: »
    Yes. Those two speakers are have different x-overs. Check it out on the spec page. Lots of discussion found by searching for it.
    http://www.polkaudio.com/homeaudio/lsi/specs.php#center

    So, forgive me for being dumb founded.But are you saying that this center with it's two 5 1/4 midranges will only produce midrange signals form one of those midranges. He hears midranges from one of the drivers and only low bass signal from the other. In other words, he hears more midrange from one driver than from the other.Since this is a center channel why would not both midranges produce the same signal and the tweeter produce the highs?
    HT System
    Parasound Halo A51 Amp, Marantz AV 8003 Pre, Arcam FMJ CD36 cd player, Marantz 7007 BD/SACD player,Acoustic Zen Matrix IC's, Analysis Plus Crystal Copper Oval IC's, Acoustic Zen Satori speaker cables, B&W 703's Fronts, Center Martin Logan Motif hybrid, Surrounds DefTech BPX, 2 X DefTech Supercube Reference Subs, DSpeaker Antimode 8033 EQ.
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  • Denon Frank
    Denon Frank Posts: 130
    edited May 2012
    dekuda wrote: »
    So, forgive me for being dumb founded.But are you saying that this center with it's two 5 1/4 midranges will only produce midrange signals form one of those midranges. He hears midranges from one of the drivers and only low bass signal from the other. In other words, he hears more midrange from one driver than from the other.Since this is a center channel why would not both midranges produce the same signal and the tweeter produce the highs?

    dekuda, why the speaker was set up this way is a engineering question I can't answer for you. But if you search "Cascade Tapered Array" , you'll find plenty of discussion on it.
    Frank

    Polk LSiM 703 mains on Skylan Stands
    Polk LSiM 704c center
    Polk FX500i surrounds
    Parasound 5250 Amp
    Oppo BDP-105 :smile:
    SVS PC Ultra tuned to 16hz
    Panasonic 65" Viera Plasma
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  • rooftop59
    rooftop59 Posts: 8,121
    edited May 2012
    this is a common mtm arrangement in center speakers, and one that many of polks centers follows. The one that it was most obvious to me with was the cs400i. It is mainly to avoid lobbing effects and effect wider dispersion.
    Living Room 2.2: Usher BE-718 "tiny dancers"; Dual DIY Dayton audio RSS210HF-4 Subs with Dayton SPA-250 amps; Arcam SA30; Musical Fidelity A308; Sony UBP-x1000es
    Game Room 5.1.4:     Denon AVR-X4200w; Sony UBP-x700; Definitive Technology Power Monitor 900 mains, CLR-3000 center, StudioMonitor 350 surrounds, ProMonitor 800 atmos x4; Sub - Monoprice Monolith 15in THX Ultra
    Bedroom 2.1     Harmon Kardon HK3490; Bluesounds Node N130; Polk RT25i; ACI Titan Subwoofer
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  • mwk455
    mwk455 Posts: 219
    edited May 2012
    Thank you for all your help. Almost took center back . Now I know not to worry about the Lsi15s when they come. Talked to Polk they call it a cascade type crossover .
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