proper power for LSi15 set up question

TRINADS
TRINADS Posts: 27
edited December 2007 in Speakers
I have a pair of LSi15's, the LsiC center, and 2 pairs of the Fxi3's for surrounds, along with the PSW10 sub to complete my 7.1 set up. This is all powered by my Pioneer Elite VSX-82TSX reciever. I want an inexpensive external amp to run my LSi15's and the LsiC center. I have been looking at the Audiosource amp300, and have read that it is a good entry level amp for the price. Any thoughts? Also, the Pio Elite outputs in 8ohms @ 130wpc, but has the option of 6ohms, should I change the settings to outpus in 6ohms? Will this sound better and give me more power to the fronts and center channels? I am up for any suggestions about the settings and/or the external amp, I just had my eye on the Audiosource due to price, as that is a big issue for me right now until I can upgrade to a more expensive unit in the future. :confused:

-The Lsi15 is rated for 20-200watts, and the LsiC is rated for 20-200watts, If the external amp outputs more than that when bridged, is this a concern? Is it too much power for the speakers? How much power can I safely run without running the risk of damaging the speakers? Sorry for all of the questions, thanks for your time!!!:(
Post edited by TRINADS on

Comments

  • tcrossma
    tcrossma Posts: 1,301
    edited December 2007
    The LSI's are 4ohm speakers, and they benefit greatly from power. The more the better, and you do not need to be at all concerned about giving them too much power. I just added a 200w @ 8ohm (380w @ 4ohm) amp to my LSI 15's and they sound fantastic.

    As to the setting on the receiver, I believe that setting it to 6ohm may actually decrease the power that goes out to the speakers. That switch is a safety measure for the receiver so that it does not damage itself by powering low-ohm speakers.
    Speakers: Polk LSi15
    Pre: Adcom GFP-750 with HT Bypass
    Amp: Pass Labs X-150
    CD/DVD Player: Classe CDP-10
    Interconnects: MIT Shortgun S3 Pro XLR
    Speaker cables: MIT MH-750 bi-wire
    TT:Micro Seiki DD-35
    Cartridge:Denon DL-160
    Phono Pre:PS Audio GCPH
  • Pepi28
    Pepi28 Posts: 248
    edited December 2007
    How much can you afford? Do a search on here about powering the LSi's. They are power hungry speakers.
    58" Samsung Plasma (on wall)(calibrated)
    LSi15's front (modded xo's)
    LSic center
    LSiFX's sides
    LSi7's rears
    Sunfire Sig. 600 amp for 15's
    Sunfire Sig. Cinema for C,S&R
    Sony ES 3000 pre/pro
    SVS 2039 PC Plus sub 12.3 (16hz tune)
    PS3
    Wii
    Signal and Audioquest ic's
    12 awg monster speaker-cable (bi-wired)
    Belkin PF60 power conditioner
    Monster power conditioner for sub
  • hockeyboy
    hockeyboy Posts: 1,428
    edited December 2007
    If you list specifically your price range you will probably get a few suggestions with links.
    My Main Gear
    Mitsu HC5000 (Proj.)
    Marantz SR8001 (AVR)
    Sunfire TGA7200 (AMP)
    Marantz DV7001 (SACD)
    Samsung BD-P1500 Blu-Ray
    LSi 15's (Front)
    LSiC (Center)
    LSiFx (Surrounds)
    DUAL SVS 20-39 CS Plus
    (Passive Subs)
    Marantz IS201 I-Pod Dock[/SIZE]
    Panamax M5300EX
    Carada Criterion 106" Brightwhite Screen
    Sunfire TGA 5200 & (4) B&W 605's in the party room
  • McLoki
    McLoki Posts: 5,231
    edited December 2007
    TRINADS wrote: »
    The Lsi15 is rated for 20-200watts, and the LsiC is rated for 20-200watts, If the external amp outputs more than that when bridged, is this a concern? Is it too much power for the speakers? How much power can I safely run without running the risk of damaging the speakers? Sorry for all of the questions, thanks for your time!!!:(

    Don't worry about over powering your speakers. (It is much easier to blow speakers with not enough power than to much - if you try hard enough, you can succeed either way though)

    I would not purchase an amp planning to bridge it though. (if you already have the amp and want to try it fine, but if you really need to bridge it, just get a more powerful amp to start with)

    Bridging not only doubles power, but distortion as well. Just get a more powerful (or better) amp to start with and look at bridging as an option available but not one you have to use.

    My amp is well over the 200wpc recommendations for the LSic (and I think 250wpc for 15's and 150wpc for 7's) and I have never had a problem with them. I think many of the bass issues you hear about with the 15's could be resolved with placement and a better amplifier.

    There are many brands available that you can use (especially if you are looking at only 2 or 3 channels). When purchasing amps, I would take a serious look at purchasing used as they seem to have a very long life and you can save a significant amount by not purchasing them new.

    Michael
    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)
  • reberly
    reberly Posts: 173
    edited December 2007
    Just yesterday I finally hooked my LSi15's to a parasound HCA1500A and I am really happy with the results. I feel like there are high and lows I never heard before at the same listening level. You should be able to pick one up used of course for $500. With 315WPC that should keep you happy for awhile.
    Onkyo TX-SR805
    Polk LSi15 , LSiC, LSiFX
    Parasound Halo A52
    Panasonic 42'' Plasma
    Oppo BDP-83
    Sonos
    Panamax 4300
    Audioquest cables