Marantz PM-84D (1980s)
Documentation on the Marantz PM-84D is thin, and even its basic classification is a point of contention — some sources call it a power amplifier while others group it with integrated amps. What is consistent across the record: it's a solid-state stereo amplifier from the 1980s, rated at 120 watts per channel into 8 ohms (both channels driven, EIAJ). Distortion is listed at 0.003% at 30W into 8 ohms. It weighs 15.0 kg and measures 456mm wide, 84mm high, and 313mm deep.
The original Japanese price was ¥179,000, though no launch year is documented. The unit appears to have remained in circulation among collectors — a 2024 resale listing confirms continued trading activity. A period review in Audio (February 1988, p.47) covered the PM-84D alongside the PM-94, noting that these amplifiers housed four separate power supplies on one chassis — each channel with its own supply for the low-level voltage amplifying circuitry and a separate supply for the output stage, each powered by its own winding from an oversized toroidal transformer.
Beyond that, the record is largely silent. No frequency response, signal-to-noise ratio, input sensitivity, or damping factor figures are documented. No production run estimates, service notes, or common-failure reports have surfaced in the archive's sources.
Known specifications:
- Output: 120W + 120W (8 ohms, both channels driven, EIAJ)
- THD: 0.003% (30W, 8 ohms)
- Dimensions: 456mm × 84mm × 313mm
- Weight: 15.0 kg
- Type: Solid-state
- Original price (Japan): ¥179,000
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