Amazing Vintage Pioneer HPM-40 Speakers! Tested and working! -...
Pair of Pioneer Model HPM-40 Crossover – Teletechproaudio
Pioneer HPM-40 - YouTube
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
Used Pioneer HPM 40 Loudspeakers for Sale | HifiShark.com