I was cruising down my street, a couple of blocks from my house and thought I spied a pair of Pioneer HPM-100s at the curb. I slammed on the brakes and had them gathered up before I took my next breath. They were completely trashed, cabs, drivers, cross-overs, connector panels, and all. I have been able to get sweet replacement parts for all, and they are now singing sweetly in my secondary rig, as a choice between Maggie MG-1s, EPI A500s, AR9s, and these HPM-100s. I still have less into them than what I could get if I sold them.
My main rig already powers a triple-stack of HPM-100s, so I would have to lay them all on their sides to fit this set in there. I don't have room for side-laying HPM-100s so in the secondary rig they shall stay for now. I will say that they comport themselves well, considering the speaker company they are keeping. To power the switchable speaker selections, I am using a Yamaha M-80, soon to be replaced with fully restored M-85.
Enjoy,
Rich P