LSI-C no Midrange

John Roberts
John Roberts Posts: 2
edited July 2008 in Basic Hookup/Wiring Questions
Tweeter is working but no Midrange is being produced from the 2-5 1/4" Drivers. Any suggestions? Are the midranges blown? I cant recall pushing them hard. I have reversed the wiring and tried it on two different amps.

John
Post edited by John Roberts on
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  • Dennis Gardner
    Dennis Gardner Posts: 4,861
    edited June 2008
    Make certain your brass jumper straps are in place on the speaker posts.
    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

    2 Channel Thorens TD 318 Grado ZF1, SACD/CD Marantz 8260, Soundstream/Krell DAC1, Audio Mirror PP1, Odyssey Stratos, ADS L-1290, ICs-DIY Twisted , Speaker-Raymond Cable
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  • John Roberts
    John Roberts Posts: 2
    edited June 2008
    Hey Tennis,

    Jumpers are screwed down. I pulled out the midrange driver and directly hooked it up and it played. Any other suggestions...do I have a blown crossover?
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  • Dennis Gardner
    Dennis Gardner Posts: 4,861
    edited June 2008
    John Roberts wrote: »
    Hey Tennis,

    Jumpers are screwed down. I pulled out the midrange driver and directly hooked it up and it played. Any other suggestions...do I have a blown crossover?

    Check all the connections to the crossover, but it sounds like it could be the issue.
    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

    2 Channel Thorens TD 318 Grado ZF1, SACD/CD Marantz 8260, Soundstream/Krell DAC1, Audio Mirror PP1, Odyssey Stratos, ADS L-1290, ICs-DIY Twisted , Speaker-Raymond Cable
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  • McLoki
    McLoki Posts: 5,231
    edited June 2008
    Just to make sure there is a good connection, try to hook your speaker cables to the lower posts rather than the upper ones. (should not make a difference - but if the brass jumper srips are loose, you will get bass with no highs that way)

    Give it a shot and report back.

    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)
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  • hockeyboy
    hockeyboy Posts: 1,428
    edited June 2008
    Try checking the settings on your AVR. It may have accidentally gotten switched to "Small or Large".
    My Main Gear
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  • mdschlayer
    mdschlayer Posts: 209
    edited July 2008
    Just wanted to comment about my Lsi Center - I never hear anything coming from the left woofer. I wish the crossover was higher to let more low-mids come through. My opinion is the right woofer does alot of work without the help of the left. If this was changed, I could see the mids coming through louder & clearer.
    I am happy with the tweeter and the highs.
    LSi15's, LSiC, LSiF/x's, LSi7's, vr3 crossover upgrades, SVS PC-12 Plus, SVS SB-16 Ultra, Marantz AV8805, Parasound amps, LG OLED65C9PUA, Clarus Crimson, Signal Cable, Atlas Cable, Shunyata and Synergistic A/C conditioning, dedicated Cardas 30A and Furutech 20A AC lines, Box Furniture, Solid Tech ROS, Symposium roller blocks
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  • Dennis Gardner
    Dennis Gardner Posts: 4,861
    edited July 2008
    mdschlayer wrote: »
    Just wanted to comment about my Lsi Center - I never hear anything coming from the left woofer. I wish the crossover was higher to let more low-mids come through. My opinion is the right woofer does alot of work without the help of the left. If this was changed, I could see the mids coming through louder & clearer.
    I am happy with the tweeter and the highs.

    You are experiencing the cascaded/tiered crossover design built for the LSiC. A number of people have expressed concern over both mid-woofers not putting out the same sound. I think this is mostly by those running the speaker without grills and noticing one driver working harder than its seemingly identical brother on the other side. My experience is that with the grills on, I tend to get the focus back on the music/film at hand and forget the gear.
    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

    2 Channel Thorens TD 318 Grado ZF1, SACD/CD Marantz 8260, Soundstream/Krell DAC1, Audio Mirror PP1, Odyssey Stratos, ADS L-1290, ICs-DIY Twisted , Speaker-Raymond Cable
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