I don't know the answer to your first question. But, I picked up a pair of these free some time ago. I like the cabinets (good contruction, that classic 70's look) but they sounded flat. I gutted them, cut a new baffle board and installed an 8" Rega woofer, a planar tweeter, and a DIY 2 way 1st order crossover. They sound fantastic. I think I have all of $150 into them.
I still plan to refinish the cabinets - something I'm putting off
I still plan to refinish the cabinets - something I'm putting off