Conventional kazoo has paper cone.
Blow into a kazoo and what do you hear? A buzzing noise you'd expect from a toy that costs about fifty cents. But just as the paper cone in a conventional kazoo creates a buzzing noise, the paper cone in most conventional speakers creates distortion.
The reason? Paper cones flex.
As they alter their shape, they alter your music.
Pioneers HPM speakers have cones made of Polymer Graphite instead of paper. This amazing material reduces speaker distortion up to three-fold. Which means instead of listening to your speakers you can listen to a lot more of your music.
What's more Polymer Graphite
Conventional speaker has paper cone, is lightweight and non -resonant.
So it doesn't add any of its own sound to your music.
So why buy a conventional paper speaker and limit your system's high fidelity, when you can buy a Pioneer HPM Polymer Graphite speaker and improve it.
PIONEER We bring it back alive.
Pioneer's speaker has polymer graphite cone.
Pioneer HPM Polymer Graphite
(High Fidelity, May 1981)
Also see:
Jensen speakers (ad, May 1981)
Technics by Panasonic -- SL series turntables (ad, Nov. 1977)