LSIC Speaker Problem?

rencan
rencan Posts: 7
edited November 2007 in Electronics
Should I be hearing sound from both woofers?
I can voices from the right speaker, however only get faint sounds from left woofer. Any ideas as to what could be wrong?

tks,
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  • dkg999
    dkg999 Posts: 5,647
    edited November 2007
    I don't think anything is wrong. If I remember correctly the two mid/woofs are not crossed-over at the same point, so they each produce different frequencies of sound. I would try some music or movies that have a pretty dynamic range of sounds and see if on the lower frequencies the other mid/woof kicks in.
    DKG999
    HT System: LSi9, LSiCx2, LSiFX, LSi7, SVS 20-39 PC+, B&K 507.s2 AVR, B&K Ref 125.2, Tripplite LCR-2400, Cambridge 650BD, Signal Cable PC/SC, BJC IC, Samsung 55" LED

    Music System: Magnepan 1.6QR, SVS SB12+, ARC pre, Parasound HCA1500 vertically bi-amped, Jolida CDP, Pro-Ject RM5.1SE TT, Pro-Ject TubeBox SE phono pre, SBT, PS Audio DLIII DAC
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  • Dennis Gardner
    Dennis Gardner Posts: 4,861
    edited November 2007
    Welcome to ClubPolk!

    Nothing is wrong....the crossover in the LSi series uses different crossover points in its tiered crossover so that one of the woofers is effectively a mid woofer while the other operates at lower frequencies.

    Edit: Sorry DKG.... you are correct.
    HT Optoma HD25 LV on 80" DIY Screen, Anthem MRX 300 Receiver, Pioneer Elite BDP 51FD Polk CS350LS, Polk SDA1C, Polk FX300, Polk RT55, Dual EBS Adire Shiva 320watt tuned to 17hz, ICs-DIY Twisted Prs, Speaker-Raymond Cable

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  • rencan
    rencan Posts: 7
    edited November 2007
    Thanks for the quick response, I'll give that a shot.
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  • polkatese
    polkatese Posts: 6,767
    edited November 2007
    http://www.polkaudio.com/forums/showthread.php?t=16326&highlight=lsic+problem
    I am sorry, I have no opinion on the matter. I am sure you do. So, don't mind me, I just want to talk audio and pie.
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  • RuSsMaN
    RuSsMaN Posts: 17,986
    edited November 2007
    It's a cascaded crossover as DKG said. Some might refer to it as a '2.5 way' speaker.

    Crossover Driver 1: LPF at 200Hz, 12dB/oct.
    Driver 2: LPF at 2.4kHz, 12dB/oct.
    Tweeter: HPF at 2.4kHz, 18 dB/oct.

    One woofer is only playing up to 200Hz, while the other plays up to 2400Hz. This prevents lobing while using mid-bass drivers in a horizontal array, and makes the center sound a WHOLE lot better. If they were crossed over at the same frequency, it would seem louder overall, but sound like hammered ****.

    Welcome to the forum, and thanks for choosing Polk Audio!

    Cheers,
    Russ

    *Edit - lots of quick replies, Polkies are on the ball tonight, good job!*
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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  • rencan
    rencan Posts: 7
    edited November 2007
    Thanks for the welcome......I've been reading post for quite a while.
    I've owned the LSI15's for several years now and am still very satisfied with them.

    I bought a 3808 about a month ago; however didn't cross my mind that I may need an AVR that can deliver 4ohms......

    Thanks again everyone.!
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