HPM-300
| Brand | Pioneer |
| Manufacturer | Pioneer Electronic Corporation |
| Series | High Polymer Molecular |
| Function | Speaker |
| Produced | 1980-1982 |
| Country | Japan |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 30 × 53.1 × 29.5 cm (W × H × D) |
| Weight | 24.25lbs |
| Frequency Response | 40Hz-50kHz |
| Super Tweeter | Horn-loaded Piezoelectric (High Polymer Molecular film) |
| Treble | 1.75" Polymer Graphite Cone |
| Midrange/Bass | 8" Polymer Graphite Cone |
| Impedance (Nominal) | 8Ω |
| Sensitivity | 89dB/W/m |
| Sensitivity (DIN, 96dB/1m) | 5.0W |
| Enclosure Type | Bass Reflex |
| Enclosure Construction | Particleboard |
| Finish | Walnut-grained Vinyl |
| Connections |
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