Replacing a PR

VR3
VR3 Posts: 29,384
edited May 2010 in DIY, Mods & Tweaks
In the centers -- I am contemplating replacing the Planar PRs with actual PRs

Planar PRs for those that didnt know (like me) are just a piece of wood mounted to surrounds...

So -- what would entail putting an actual PR in there - I know Def Tech basically did it to cut cost....

Thoughts?
- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • FTGV
    FTGV Posts: 3,650
    edited May 2010
    Vr3MxStyler2k3 wrote: »
    In the centers -- I am contemplating replacing the Planar PRs with actual PRs

    Planar PRs for those that didnt know (like me) are just a piece of wood mounted to surrounds...
    I must ask what do you expect to gain? A passive radiator is just a diaphram of a specific size and weight that is tuned to a certain frequency to extend the bass response of the system. IMO changing to a different PR gains you nothing and if the new one wasn't tuned correctly would actually degrade the bass performance of your speakers.
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  • VR3
    VR3 Posts: 29,384
    edited May 2010
    My main thoughts are the fact its just a piece of wood. There is no spider or anything - the "woofer" as we'll call it just kind of exists and moves as it sees fit.

    My thought is replacing it with a real woofer/PR will give it more control and more definition - possibly even dig lower...
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • FTGV
    FTGV Posts: 3,650
    edited May 2010
    Vr3MxStyler2k3 wrote: »
    My main thoughts are the fact its just a piece of wood.
    Are you sure it's wood?
    There is no spider or anything - the "woofer" as we'll call it just kind of exists and moves as it sees fit.
    A PR has no magnet or voice coil as it is not meant to be driven by the amplifier,instead it is put into motion by the air pressure or backwave of the woofer.It like a bass reflex port is tuned (by it's mass)to extend the bass response of the woofer to a lower frequency.
    My thought is replacing it with a real woofer/PR will give it more control and more definition - possibly even dig lower...
    I 'll repeat what I said in my previous post that unless it is tuned correctly a replacement PR will degrade bass response and not improve it.
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  • Face
    Face Posts: 14,340
    edited May 2010
    Pics?
    "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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  • FTGV
    FTGV Posts: 3,650
    edited May 2010
    Is this the speaker?http://www.definitivetech.com/Products/products.aspx?productid=StudioMonitor%20450
    While the claim of 24hz extension seems a little bit optimistic It appears to have(atleast on paper)excellent bass response for such a small system utilizing a 6.5" woofer.Personally I wouldn't mess with the bass tuning aspect of this one.
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  • VR3
    VR3 Posts: 29,384
    edited May 2010
    ok, sounds like Im just over thinking it haha

    Ill leave it alone...

    Ill post a pic when I get the 2nd pair cracked open
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • madmax
    madmax Posts: 12,434
    edited May 2010
    The only difference with the wood is that less weight will have to be added. The spider won't buy you anything, just allowed the manufacturer to use a more wimpy surround.
    Vinyl, the final frontier...

    Avantgarde horns, 300b tubes, thats the kinda crap I want... :D
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