ESC
HPM-40/U1

HPM-40/U1

BrandPioneer
ManufacturerPioneer Electronic Corporation
SeriesHigh Polymer Molecular
FunctionSpeaker
Produced1976-1978
CountryJapan
Form FactorBookshelf / Stand Mounted
Signal PathPassive Hardware
Dimensions32.5 × 56.9 × 31.8 cm (W × H × D)
Weight28.6lbs
Frequency Response35Hz-25kHz
Super Tweeter180° Piezoelectric (High Polymer Molecular film, Part #HP-015A)
Treble1.75" Carbonfiber Blended Cone (Part #45-710A)
Midrange/Bass10" Carbonfiber Blended Cone (Part #25-730A)
Impedance (Nominal)8Ω
Sensitivity91dB/W/m
Crossover Frequencies4kHz, 10kHz (Network Assembly Part #SWN-108)
Crossover Slope6dB/Oct (First Order)
Power Handling (Nominal)20W
Power Handling (Peak)40W
Enclosure TypeBass Reflex
Enclosure ConstructionParticleboard
FinishOiled Walnut
Connections
  • Input · Spring Terminal
Controls
  • Treble Level · Rotary Pot