Pioneer HPM-200 (circa 1976–1977)
Little is documented about the Pioneer HPM-200 beyond its period advertising and a handful of magazine references. Here is what the record shows. It was the flagship of Pioneer's original HPM series. That line introduced the company's "High Polymer Molecular" film technology, a proprietary material used for the tweeter and supertweeter diaphragms. The more common HPM-100 used a 4-way, 4-driver layout. The HPM-200 stepped up to a 5-way, 5-driver system. HiFI-Stereo (July 1976, p.2) presented both models together and positioned the HPM-200 as the top of the range. Audio (February 1977, p.2) described the driver complement in some detail.
The HPM-200's tweeter and supertweeter were unusual 360° cylindrical dome units, made from neoprene-impregnated cloth and driven peripherally. Audio (February 1977, p.2) noted the design was intended to keep distortion low. Two woofers handled the low end. One was optimized for deep bass and the other for upper bass, and together they covered frequencies up to 700 Hz. Pioneer marketed the whole system as built to handle high-power amplifiers capable of well over 100 watts per channel. HiFI-Stereo (March 1976, p.2) and several other ads repeated that selling point, which suggests Pioneer felt most existing speakers couldn't keep up with the powerful receivers of the mid-1970s.
Surviving information on the HPM-200 is thin. No service manuals, complete specifications, or original prices have surfaced in the Archive's research. Its exact years of production, cabinet dimensions, impedance, and sensitivity all remain undocumented. What exists is a clear picture of its intent: a high-power, multi-driver speaker at the very top of Pioneer's HPM lineup.
- Configuration: 5-way, 5-driver system
- Tweeter/Supertweeter: 360° cylindrical neoprene-impregnated cloth dome, peripherally driven
- Woofer complement: Two woofers — one for deep bass, one for upper bass — covering frequencies up to 700 Hz
- Diaphragm material: High Polymer Molecular film (tweeter/supertweeter)
- Period marketing claim: Designed to handle the output of amplifiers producing over 100 W/channel
- Series context: Top model in original HPM line, above HPM-100 (4-way, 4-driver)
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