Pioneer HPM-40 HPM40 Speakers With High Range Level Sequence Serial Numbers Rare | eBay
Found these first gen pioneer hpm 40's for free on craigslist. They look pretty good after cleaning, and all they need are new surrounds and possibly a new tweeter (one of the
Pioneer HPM-40 Old Version Speakers (for parts or repair) Photo #1998073 - Aussie Audio Mart
Pioneer HPM40 | Reverb
Pioneer HPM-40 Bass Reflex Type Loudspeaker 1976-79 | Reverb