Monitor 10B Internals

Rhombus
Rhombus Posts: 13
edited March 2006 in Vintage Speakers
Besides: the drivers, wiring, and the crossovers, what are these speakers supposed to look like internally? Mine seem to have an overabundance of acoustic matting. There's no air space. These were bought used. I have a feeling they were modified and want to know what the OEM design was. Anyone know?
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  • Flash21
    Flash21 Posts: 316
    edited March 2006
    I have never actually opened mine up, but I would expect quite a bit of fiberglass dampening material inside...resonance is an enemy (unless carefully planned for) in speaker design.
    Steve Carlson
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  • jakelm
    jakelm Posts: 4,081
    edited March 2006
    My 7's have material behind the tweeter that stops at the midwoofer. From there to the bottom there is none. And there is no resonance problem. But adding material to the box accually tricks the woofers into thinking there is more airspace than there is. In the case of the 10's, Polk might have thought the box itself did not have enough airspace so they added dampaning material to compinsate. IMO in a sealed inclosure you can't have too much dampaning material.
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  • Rhombus
    Rhombus Posts: 13
    edited March 2006
    Ok, thanks...
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  • decato
    decato Posts: 188
    edited March 2006
    The Monitor 10, at least the 10B and 10 Series 2, has a large amount of damping material inside. There should be one tightly rolled sheet behind the tweeter. It essentially occupies all the space in the upper 1/3 of the cabinet. Then there should be another sheet, split in half to fit around the brace, occupying the area behind the drivers and passive radiator.
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  • bigyank
    bigyank Posts: 224
    edited March 2006
    I have the Model 10's and they are damped the same way. :D
    Polk Monitor 7
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  • danger boy
    danger boy Posts: 15,722
    edited March 2006
    Rhombus wrote:
    Besides: the drivers, wiring, and the crossovers, what are these speakers supposed to look like internally? Mine seem to have an overabundance of acoustic matting. There's no air space. These were bought used. I have a feeling they were modified and want to know what the OEM design was. Anyone know?


    snap a few pics of those 10's we go ga ga over pics in here. :D
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  • Rhombus
    Rhombus Posts: 13
    edited March 2006
    Ok, that's exactly how mine are damped. It must be normal. Thanks you, guys.
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  • Modvlar
    Modvlar Posts: 51
    edited March 2006
    Hmmm, my 10Bs didn't seem to be packed that much, just around the walls really... There is airspace. Sound absolutely phenominal, so I don't think I'll change a thing.

    When I change my polyswitches, I'll peek into the cabinet again to make sure.
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