HPM's free?

I doubt it. More likely to be low-end Fisher (Studio Standard) or border-line white-vans (Acoustics 2000, etc.).
 
The cabs look too tall in relation to the woofer for 100's anyway. I thought it might just be the angle he photographed them at.
 
There certinly not HPM-100 HPM -100 are 15.5" X 15.5" X 26" the one in the photo have a rectangular foot print
 
I reckon they could easily be low-end Pioneers, perhaps from a rack system, but I've not seen any HPM's with white woofers. - Mark
 
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