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  1. #1

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    Default Replacing bose lifestyle cubes w/ Polk

    I currently have a Bose Lifestyle 38 system (i know, I know, don't start), & would like to start replacing the cubes w/ Polk surround speakers (starting w/ the center speaker, RM8 Center). Since Bose doesn't publish their friggin specs, I don't know how much wattage the Bose/acoustimass is putting out and if it will blow the Polk speaker. I have a feeling the Bose cubes are 6 ohm & the amp is pushing somewhere in neighborhood of 100 watts, so I'm thinking I'm ok to switch to an 8 ohm speaker that handles 125 watts. Has anyone done this already or know for sure?

  2. #2

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    Talking

    Am sure Polk CS will be able to help you out, contact them and if am not mistaken they will surely have data to back this up.

  3. #3

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    Hi Zimbob, welcome to CP.

    Getting right to it, I wouldn't do it. I doubt very seriously that the Bose amp is putting that kind of power into the cubes. The lion's share of the power is going to the 'sub'. I also believe Bose uses higher impedance levels. I believe if you connect even 8 ohm speakers to that amp, it will clip out and blow your new speakers. Of course, as you said, Bose won't publish specs, so no one knows for absolute sure.

    I wouldn't risk it. A new receiver will drive the Bose cubes, albeit with less power, than it would drive normal impedance speakers. (8/4 ohm).....but it would be the safer upgrade, then do up the speakers.

    Best of luck heading down the rabbit hole.:D

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    Quote Originally Posted by LessisNevermore View Post
    Hi Zimbob, welcome to CP.

    Getting right to it, I wouldn't do it. I doubt very seriously that the Bose amp is putting that kind of power into the cubes. The lion's share of the power is going to the 'sub'. I also believe Bose uses higher impedance levels. I believe if you connect even 8 ohm speakers to that amp, it will clip out and blow your new speakers. Of course, as you said, Bose won't publish specs, so no one knows for absolute sure.

    I wouldn't risk it. A new receiver will drive the Bose cubes, albeit with less power, than it would drive normal impedance speakers. (8/4 ohm).....but it would be the safer upgrade, then do up the speakers.

    Best of luck heading down the rabbit hole.:D
    That would probably be your best bet.

    I remember reading information from private tests stating that the Bose cubs run at a 16 or 32 ohm nominal impedance. I'd upgrade your AVR first...and then start upgrading the speakers.
    The nirvana inducer-
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  5. #5

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    Bose Rocks !!!!!!!!!!!!!!!

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    Quote Originally Posted by leroyjr1 View Post



    Bose Rocks !!!!!!!!!!!!!!!
    Lee- I'll trade you a Bose Lifestyle system for the Pio SC-07 and the RTi A9's...deal?;)
    The nirvana inducer-
    APC H10 Power Conditioner
    Denon DVD-2910 universal player
    DPA The Little Bit Three DAC
    Yamaha P-300 turntable/TCC TC-750 phono preamp
    Acurus L10 preamp
    Adcom GFA-545 power amp
    PolkAudio SDA 2A's/PolkAudio Monitor 7A's
    Audioquest Type 4 speaker cables
    Audioquest Sidewinder IC's
    Audioquest Black Mamba IC's
    Signal Cable Analog II IC's

  7. #7

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    I agree with the guys on this one, ditch the Bose unit and upgrade with a new AVR. Then get ahold of some speakers. Good luck and welcome to Club Polk.
    HT Rig
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    Another welcome, and recommend you taking some pic.'s of your system, and SELLING it on craigslist.
    If you can get $1,000-1,500, WE could build you a damn nice system.
    I refuse to argue with idiots, because people can't tell the DIFFERENCE!

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    Quote Originally Posted by comfortablycurt View Post
    Lee- I'll trade you a Bose Lifestyle system for the Pio SC-07 and the RTi A9's...deal?;)
    I still have my first Bose system (Bose 321) which is currently running in my daughters bedroom. It does a great job playing poor recorded music. No match for my 2 channel rig.

  10. #10

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    There'll be lots of advice but just make sure you make the final decision.

    Its a buyer's market - resale prices are not good but you can
    find great deals like when people are upgrading their systems.

    good luck....and Welcome to Club Polk.

  11. #11

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    Thanks all for your help. Unfortunately, I need (& want) to keep the core lifestyle media center as I haven't seen any other supplier w/ the functionality of the umusic center (loading several hundred cd's into memory & playing them back in any order desire, & literally having it 'memorize' my musical tastes, ie jazz, etc). Also, I don't happen to have $2500 in my pocket to spend on a new system. At this point, I'm simply wanting to know feasibility of starting to swap out bose cubes a few at a time.....

  12. #12

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    Quote Originally Posted by Zimbob View Post
    Thanks all for your help. Unfortunately, I need (& want) to keep the core lifestyle media center as I haven't seen any other supplier w/ the functionality of the umusic center (loading several hundred cd's into memory & playing them back in any order desire, & literally having it 'memorize' my musical tastes, ie jazz, etc). Also, I don't happen to have $2500 in my pocket to spend on a new system. At this point, I'm simply wanting to know feasibility of starting to swap out bose cubes a few at a time.....
    Get a hold of an ohmmeter and measure the DC impedance of the Bose Cube speaker. That measurement will give you a pretty good idea on whether a typical 6 - 16 ohm speaker will work.
    Last edited by xcapri79; 07-31-2009 at 10:45 AM.

  13. #13

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    Quote Originally Posted by comfortablycurt View Post
    That would probably be your best bet.

    I remember reading information from private tests stating that the Bose cubs run at a 16 or 32 ohm nominal impedance. I'd upgrade your AVR first...and then start upgrading the speakers.
    I was told differently than that. 16 or 32 ohms at the volume those play at, and the distortion levels they have would mean some serious power. I believe they are 2 or 1 ohm with upwards of 10% THD.

    This means any speakers you put on will be extremely quiet and sound horrible.

    Listen to everyone else though, get a decent AVR and speakers, and sell the bose lifestyle off to some unsuspecting person on Craigslist for a pretty penny.

    I bet you could come out even.
    Main Surround -
    Epson 8350 Projector/ Elite Screens 120" / Pioneer Elite SC-35 / Sunfire Signature / Focal Chorus 716s / Focal Chorus CC / Polk MC80 / Polk PSW150 sub

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  14. #14

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    This isn't slow trying to sneak back in is it? JK

    Welcome to cp you will get some very useful info. here I know I have and so dose my bank account.

    Mark
    Sig to be updated after dealing with the insurance company:(:(:(

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