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  1. #1

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    Default Polk Audio Speaker

    Hi, looking forward to buy a pair of LSiM705 and LSiM703 along with my LSiM704c. Just like to know if my old Onkyo TX-Nr609 will provide the speakers with enough power or I need a more powerful receiver to do the job right? What specs I should be looking at on the amp to see if it can provide enough power for these speakers? thx

  2. #2

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    It will power those speakers, but they could do with a little more power. Specs say 125 watts, but that would be 2 channels driven. Going up to 5 channels, you'll probably be closer to 90 watts or so. I may be incorrect, but it appears that your AVR doesn't have pre-outs, which means an amp would be of no benefit.

    I would say try it, give it a listen. You may be perfectly happy with the preformance. Just don't push the volume knob too high. I wouldn't go any higher than about -15 or so, you don't want to take a chance on clipping those speakers.

    If you feel you need more power, you will have to buy a new AVR, with pre-outs, or go the seperates route. If you are going to buy an amp, 200 watts would work, more is always better. This is assuming you go the solid state route instead of tubes.

    Welcome to Club Polk

  3. #3

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    So would you suggest that I should be better off shopping for less power consuming speakers if I just cannot afford a new more powerful amp or avr? Many thx

  4. #4

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    You are looking at top of the line (Polk) speakers with a bottom feeder AVR. Need to decide where to spend your $$. But welcome to CP nonetheless...

  5. #5
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    Agreed. Spending the money for higher end speakers may not sound as good with lower quality power as buying the best speaker match for your receiver. What budget do you have in mind for speakers, and any money left over for electronics?

  6. #6

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    Feed your speakers, airlung. FEED THEM!
    Front Speakers: Polk Audio LSi15 x 2
    Center Speaker: Polk Audio LSiC
    Rear Speakers: Polk Audio LSiF/X x 2
    Subwoofers: Polk Audio PSW505 x 2
    AVR: Denon AVR-3313CI
    Amp: Emotiva XPA-5

  7. #7

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    Now you have me wondering. I just bought a pair of 705's, they are inbound from Polk ebay. I am wondering if my NAD C375 BEE will do the job. Any comments or input will be welcomed. Thanks.
    Regards, Bob

    Samsung PN51E6500 Plasma
    Marantz UD 7006 7.1 Blue Ray/CD/DVD Player
    Marantz SR 7007 HT Procesor
    Polk LSiM 705 Fronts
    Polk LSiM 706c Center
    Polk LSiM 703 Rear
    Klipsch RW12D Sub
    Music Hall 5.1 SE TT

  8. #8

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    Your NAD should be fine. AVR and amplifiers are 2 completely different animals when talking power. Amps have more realistic ratings

  9. #9

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    Thx u all for helping, I really cannot afford a decent amp. And the problem is that I already purchased a LSiM704c and thus, I really want to purchase the complete line to make my system more complete! if I were to buy a new receiver for the LsiMs, any suggestion around $1100? (this is the best I can do) I personally like Denon, will the Denon AVR-3313 fit my needs? Thx

  10. #10

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    I have the Denon AVR-3313CI and its ok to power what I have but I want to go with a seprate amp or amps to power them and trying to pay off the speakers first (make wife happy) and then sell enough to get those amps.

    If I was a buyer for a new receiver today and interested in Denon, you need to think about the newest models. Like the X4000 that's coming out which has what the 3313CI has and a lot more like the real important Audyssey XT32/SubEQ calibration that's way better then the older MultEQ XT that the 3313CI has. Before you had to buy the top of the line 4520 Denon to get that XT32 which ran $2500 but now you can get the inbetween new model that has more then the 3313 model and features that the 4520 had (just not as much power as the 4520) for like $1300. No brainer.

    Heres more info on the new Denon line.. http://www.avsforum.com/t/1465528/th...ad-faq#user_G5

    Of course you could save more money and just get a UMC-200 for your Processor http://shop.emotiva.com/collections/...oducts/umc200/ and grab a 5.1 amp to connect to it to power all your speakers. A XPA-5 would fit nicely.. Can find a used one cheaper or wait for a sale. If that's out of the price range you could prob still be happy with a UPA-700 or UPA-500. I say the 700 cause it will give you room to upgrade to 7.1 later on and you'll also get a little more power with the un used channel currently in 5.1 use.
    Full 5 channel set of Polk Audio
    Fronts - LSiM 705
    Center - LSiM 706c
    Sides - LSiM 703
    Mits WD-82842 82" DLP 3DTV
    Denon AVR-3313CI Receiver
    Emotiva stealth DC-1
    Emotiva XPA-2/Fronts XPA-3 Center-surrounds
    Oppo 103

    Loving the new Family! :)

  11. #11

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    Does it help to feed more power into the LSiM705 if I use a bi-wire connection? The Denon AVR-3313 suggest that 125W will be provided to each channel 125w X 7 channels. If I go bi- wire with the
    LSiM705s, in theory, does this mean 250W ( 125W x 2 for
    each LSiM705) is going into each of the LSiM705? Thx

  12. #12

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    Sorry, it should be a "bi-amp"connection on the Denon AVR 3303. Where the output of both Front right and Sur Back right connected to the two ports of the right speaker and both Front left and Sur Back left connected to two ports of the left speaker.

  13. #13

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    It won't help because the power is still being made by the same power supply
    Front Speakers: Polk Audio LSi15 x 2
    Center Speaker: Polk Audio LSiC
    Rear Speakers: Polk Audio LSiF/X x 2
    Subwoofers: Polk Audio PSW505 x 2
    AVR: Denon AVR-3313CI
    Amp: Emotiva XPA-5

  14. #14

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    Airlung get the speakers you want and work your way up piece by piece.

    The 3303 will run the speakers, at there best...no. Don't get discouraged I spend 2mo-to 2yrs put my systems together its part of the hobby, and you have to start somewhere.

    Just don't over drive, FYI 705's are my favorite of the LSiM group
    Home Theater:Samsung8000-55LED,Pioneer SC35, Pioneer DV-79AVi, Sunfire TGA7201, LSi25, LCi RTSc, LC80i
    2chnl system:Melody 101 tube pre, Pass XA30.5 amp, Usher MD2 speakers, W4S Dac, MG Audio Planus2 speaker cables
    Office rig: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures

  15. #15

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    Yes, the topic has been covered. Bi-amping does not double the power going into the speakers. Mass market AVRs are not good candidates for use in bi-amping. While each channel of an AVR is capable of meeting its "per channel" rated spec, none will meet its specified output with all channels driven simultaneously because its power supply is not large enough. In real world use on movies, all channels are not required to deliver maximum or substantial power at the same time, therefore power supplies need not be capable of supporting such all-channel performance levels. Manufacturers design their products with that cost-saving approach in mind, making them better able to bring AVRs to market with all the latest bells and whistles at affordable prices. If you are serious about bi-amping, use separates.

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