LSI Impedances

bld
bld Posts: 25
edited June 2010 in Speakers
I have the LSI line of speakers.The 15's and the 9's,the impedances are 4ohm.Is that when they are both hooked up to the same output at the amp or say when a person is bi-amping does the decoupling of the two make them 8 ohms?
What i have is the 2 sets both operating as fronts,since i am not using the 7.1 anymore,ive used the 2 side surround channels of the amp to run as a second set of fronts.I just bought and hooked up a Sunfire 7401 amplifier and i would like to wire the highs to the current output on the amp,and the lower section of the 2 sets to the voltage outs.
Instead of bi-wiring up and down on one speaker to the same channel,i was thinking to bi-wire across the 2 sets to one channel.I would still like to maintain the 4 ohm impedance.Does anyone see a reason why this can't be done,I hope i've explained myself properly.
Thanks for any input you may have.
nad t175 processor
Sunfire TGA 7401 amp
LSi15 front
LSi center
LSI 9 surround
dual sunfire hrs 12 subs
LG bd 390 blueray
Sonos
Post edited by bld on
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Comments

  • Face
    Face Posts: 14,340
    edited June 2010
    Please don't.
    "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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  • bld
    bld Posts: 25
    edited June 2010
    please explain,thanks
    nad t175 processor
    Sunfire TGA 7401 amp
    LSi15 front
    LSi center
    LSI 9 surround
    dual sunfire hrs 12 subs
    LG bd 390 blueray
    Sonos
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  • Bernal
    Bernal Posts: 991
    edited June 2010
    Hello,
    I have a bi-wiring front and center. Excellent result.:D


    01) DENON AVR-4308CI: Advanced 7.1 CH/5.1+2 CH/ 3.1+2+2 CH A/V Home Theater /MultiMedia Multi-Source/Zone Receiver with Networking and WiFi/170 watts x 7 channels
    02) SUNFIRE Grand Signature - Bob Carver's and SUNFIRE Cinema Grand
    03) OPPO BDP-83SE Blu-ray Disc Player w/SACD & DVD-Audio
    04) OPPO DV-980H 1080p Up-Converting Universal DVD Player with HDMI and 7.1CH Audio
    05) DENON DVD-2500BTCI: Blu-ray Disc™ DVD/CD Digital Player/Transport
    06) HITACHI P55T501. 55" HD1080 Plasma HDTV
    07) POLKAUDIO LSiC (Center speaker)
    08) POLKAUDIO LSi15 LEFT (Front speaker)
    09) POLKAUDIO LSi15 RIGHT (Front speaker)
    10) POLKAUDIO LSiC Vertically (Surround speaker)
    11) POLKAUDIO LSiC Vertically (Surround speaker)
    12) POLKAUDIO LSif/x LEFT (Surround back speakers)
    13) POLKAUDIO LSif/x RIGHT (Surround back speakers)
    14) VELODYNE OPTIMUN SERIES 12"(High Output Digital EQ SubWoofer 2400W/1200WRMS)
    http://www.polkaudio.com/forums/showcase/view.php?userid=98096 (Not updated)
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  • cfrizz
    cfrizz Posts: 13,415
    edited June 2010
    Keep it simple, your Sunfire has more than enough power to drive the speakers without biwiring. It is highly unlikely you will hear any benefit & simply having a useless mess of wires everywhere. Welcome to Club Polk.
    Marantz AV-7705 PrePro, Classé 5 channel 200wpc Amp, Oppo 103 BluRay, Rotel RCD-1072 CDP, Sony XBR-49X800E TV, Polk S60 Main Speakers, Polk ES30 Center Channel, Polk S15 Surround Speakers SVS SB12-NSD x2
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  • Face
    Face Posts: 14,340
    edited June 2010
    He's not talking about bi-wiring. He's talking about a mess of sound, AKA, stacking.
    "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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  • Bernal
    Bernal Posts: 991
    edited June 2010
    Face wrote: »
    He's not talking about bi-wiring. He's talking about a mess of sound, AKA, stacking.

    + 1 :eek:
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  • bld
    bld Posts: 25
    edited June 2010
    I wasn't really talking about a mess of sound,and know what you mean and am not taking it negativley,i just thought of utililising the current output to soften the highs of both sets of fronts,but i think I'll take blue foxes and cfrizz's advice and just leave well enough alone.Thanks
    nad t175 processor
    Sunfire TGA 7401 amp
    LSi15 front
    LSi center
    LSI 9 surround
    dual sunfire hrs 12 subs
    LG bd 390 blueray
    Sonos
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  • Bernal
    Bernal Posts: 991
    edited June 2010
    I recommend following the Manual ...


    attachment.php?attachmentid=49373&d=1275618271
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  • bld
    bld Posts: 25
    edited June 2010
    I have all that info thanks.I was just looking a little further from the ordinary setup just to play.I'm always playing to get a better outcome.
    nad t175 processor
    Sunfire TGA 7401 amp
    LSi15 front
    LSi center
    LSI 9 surround
    dual sunfire hrs 12 subs
    LG bd 390 blueray
    Sonos
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  • nooshinjohn
    nooshinjohn Posts: 25,473
    edited June 2010
    I run my highs from the current outputs and the lows off the voltage taps with great results. I concur with the rest in that you will need no more power than what you have on hand to make the LSi's come to life.
    The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD

    “When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson
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