Product Name: Bose RA-8 CDA-8 MDA-8 I received these from an acquaintance and am putting them up for sale. They appear to power on, but I haven't been able to confirm their functionality. I'm not very knowledgeable about audio equipment, so I'm selling them as junk. Apparently, they are very good items, and I hope someone can make good use of them. Thank you very much.