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Thread: LSi15

  1. #1

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    Default LSi15

    Hi All:

    My name is Roger and I'm new to this forum. I inherited an extra pair of Polk speakers (LSI15s) from a relative who was downsizing and said he never used them --but he also warned me not to turn up the volume until I buy an amp because my receiver was marginal. It's a Pioneer 1121-K.

    I have two questions: can I play at low volumes and not hurt the speakers/receivers until I buy a proper amp. If not, I have an old Kenwood amp (KM-206) that was part of an older system I used to have --can I use that in the meantime?

    Thank you...

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    Quote Originally Posted by AmericanTico View Post
    Hi All:

    My name is Roger and I'm new to this forum.
    I have two questions: can I play at low volumes and not hurt the speakers/receivers until I buy a proper amp. If not, I have an old Kenwood amp (KM-206) that was part of an older system I used to have --can I use that in the meantime?
    Thank you...
    Welcome to the forum.
    I never had LSI series (too expensive) but they are excellent speakers from what I read.

    1. Yes, just don't push them too hard at high volumes.
    Either receiver or Kenwood will work since both are similar watts
    2. Kenwood is a dedicated amp so may handle high volumes better but you need a pre-amp for kenwood since it doesn't have a volume control and you can use Pioneer receiver as pre-amp if it has pre-out.

    Boston A400,VR950, DefTech BP10,, Klipsch Forte,KSP-400,KSF-C5,RF3,RC3.
    JBL L20t,L80t3, EPI 20+,T/E 280, Polk 4,4.5,5A,7C, KEF Coda III, Yamaha NS-690, Genesis 3+.
    SUB:Deftech PF15TL+, DCM TB1010, Velodyne VA08BVX10. Pre: HK AP2500. Amps: BB175, Adcom GFA-535,555II, Rotel RB-990BX.

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    I believe my receiver has pre-outs. So if I understand you correctly...if I hook the amp up to the receiver I can control the volume through later. Again, a temporary situation. And I don't ever intend to play music too loud as I live in a small condo. :(

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    Quote Originally Posted by AmericanTico View Post
    I believe my receiver has pre-outs. So if I understand you correctly...if I hook the amp up to the receiver I can control the volume through later. Again, a temporary situation. And I don't ever intend to play music too loud as I live in a small condo. :(
    Yes, don't use receiver to power speakers.
    That means, no speaker wires on the receiver.
    Receiver pre-outs RCA left/right to Kenwood and use speaker wires from Kenwood to speakers.
    Also, only use one set of outputs either A or B.

    If you live in a townhouse like me, doesn't matter what you use.
    I never use more than few watts and it's already too loud.

    Boston A400,VR950, DefTech BP10,, Klipsch Forte,KSP-400,KSF-C5,RF3,RC3.
    JBL L20t,L80t3, EPI 20+,T/E 280, Polk 4,4.5,5A,7C, KEF Coda III, Yamaha NS-690, Genesis 3+.
    SUB:Deftech PF15TL+, DCM TB1010, Velodyne VA08BVX10. Pre: HK AP2500. Amps: BB175, Adcom GFA-535,555II, Rotel RB-990BX.

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    You can use that receiver. It wont be optimal and I wouldnt expect those speakers to sound their best, but it will work in the interem.

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    Thank you all for the answers. You are very generous.

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    May I indulge to ask another question regarding a center channel and speaker cables? I read people mentioning Axiom speakers and how they are a bargain. Would the VP-100 match my setup - or am I better off getting an LSiC center channel? Also, does speaker cable really help sound or will radio shack do?

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    Normal rule of thumb is center should match fronts.

    There is big debate about speaker cable and it's effect but if you are not spending $100/foot any decent speaker wires will work like monster, acoustic research etc...

    Boston A400,VR950, DefTech BP10,, Klipsch Forte,KSP-400,KSF-C5,RF3,RC3.
    JBL L20t,L80t3, EPI 20+,T/E 280, Polk 4,4.5,5A,7C, KEF Coda III, Yamaha NS-690, Genesis 3+.
    SUB:Deftech PF15TL+, DCM TB1010, Velodyne VA08BVX10. Pre: HK AP2500. Amps: BB175, Adcom GFA-535,555II, Rotel RB-990BX.

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    Quote Originally Posted by AmericanTico View Post
    Hi All:

    My name is Roger and I'm new to this forum. I inherited an extra pair of Polk speakers (LSI15s) from a relative who was downsizing and said he never used them --but he also warned me not to turn up the volume until I buy an amp because my receiver was marginal. It's a Pioneer 1121-K.

    I have two questions: can I play at low volumes and not hurt the speakers/receivers until I buy a proper amp. If not, I have an old Kenwood amp (KM-206) that was part of an older system I used to have --can I use that in the meantime?

    Thank you...
    Roger .. Here's my take on the whole situation.

    I owned a VSX-1121 and now I have the entire LSI home theater. LSI15s, LSI7s, LSI C and a Sub. Do not use the LSI15s, and a center with the VSX-1121 unless you want to end up with a fried receiver. The VSX-1121 is not capable of handling the load. You can be lucky at very low volumes till one fine day it'll fry. Get yourself a used amplifier if you are on a budget. The Amp should be atleast 300 watts per channel and should have atleast 2 channels.

    The LSIs can sing like there's no tomorrow provided you get a decent amp.

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    Quote Originally Posted by Mystery View Post
    Normal rule of thumb is center should match fronts.

    There is big debate about speaker cable and it's effect but if you are not spending $100/foot any decent speaker wires will work like monster, acoustic research etc...
    Agree. The LSI C is timber matched with the LSI15s.

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    Good luck finding an LSiC, they seem to be very, very scarce now that Polk is no lomger making them
    Home Theater
    Onkyo PR-SC5508 Sharp LC-70LE847U
    Emotiva XPA-5 Emotiva XPA-2 Emotiva UPA-2
    Front RTi-A9 Wide RTi-A7 Center CSi-A6 Surround FXi-A6 Rear RTi-A3 Sub 2x PSW505
    Sony BDP-S790 Dishnetwork Hopper/Joey Logitech Harmony One Apple TV
    Two Channel
    Oppo 105D BAT VK-500 w/BatPack SDA SRS 2.3 Dreadnought Squeezebox Touch Apple TV

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    LSiC on Ebay right now for $499.99
    F:L/R LSi 15
    Cen: LSiC
    Sur: LSi FX
    SurBack: LSi 9's
    Sub: Modded PSW1000
    Sony STR-DA4400ES
    Emotiva UPA-200 W/Black Trim
    Emotiva XPA-3 W/Black Trim
    Samsung PN58A650 Plasma
    Plasma TV Wall Unit SKU: SH-CAESAR-WU

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    I run a LSi9 for my center channel.
    AVR-Onkyo TX-NR808
    Front amp-Adcom GFA 555>Polk Audio LSi9's(Vr3 Castle Mods)
    Center amp-Adcom GFA 5400>Polk Audio LSi9 bi-wired(Vr3 Castle Mod)
    Surrounds-Polk Audio F/X500's<Onkyo TX-NR808
    Sub-Velodyne SPL-1000R

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    Lsi's need a high current design amplifier section as they are 4 ohms (nominal) impedance. While you can likely run them on most receivers, keep the volume low to moderate until you upgrade your amp. The lower the impedance (sum of all resistive components), the more current (amps) you need from the amp. Cheaper amp sections typically only support 8ohm/pair speakers because they don't have the current capabilities.

    Transport: Oppo BDP-103/USB HDD (flac)
    DAC/Preamp: Benchmark DAC/PRE
    Power Amp: Parasound HCA-1500A
    Speakers: Harbeth Compact 7ES-3 Monitor
    Cables: Kimber Hero/8TC; DH Labs D-75

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