Pioneer HPM-150
(1976 - 1980)

Pre- Star-Wars-ish looks for a monster 'speaker adorned with an HPM (High-Polymer-Mylar Film) super-tweeter for a 270° dispersion of the frequencies above 8,5kHz.

Despite the looks, the HPM-150 is part of the crème de la crème in dynamic loudspeakers.
Aluminium diecast frames for each driver, carbon-charged woofer, piezo-electric super-tweeter and more.

A quote from oaktreevintage:
"Former JBL Vice President of Engineering Bart Locanthi joined Pioneer in 1975 as Vice President of Development. [...] For Pioneer he authored the HPM series. These speakers were a direct assault on the JBL L100 and L200 series. The HPM speakers evolved into Pioneers superior Pro division TAD (Technical Audio Devices)."

I have recently located the lavish USA catalog dedicated to the HPM-150 - stay tuned !