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Condition is listed as unknown, which keeps USD 175 from being an automatic bargain, but it remains a fair-to-good price if the amplifier is confirmed working. Comparable asks cluster around roughly USD 125–USD 200, with a working example listed at USD 198.77 and another in great condition at USD 175. A tested, clean unit at this money would be a solid buy; an untested one deserves negotiation.
The NA-100 is a substantial vintage integrated, rated around 110 watts per channel, with the sort of power and large fluorescent meters that make it appealing for an efficient vintage system or demanding speakers. Before buying, confirm both channels, inputs, speaker outputs, meters, and controls operate cleanly; these units may simply need contact cleaning after years idle. If the seller can demonstrate quiet operation and intact cosmetics, USD 175 is sensible rather than inflated.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Nikko Audio emerged from Nikko Electric Industry Co., founded in 1933 in Kanagawa, Japan, initially as a manufacturer of fuses and electrical equipment for the national railroad. Post-World War II, the company expanded into communications technology, entering the hi-fi market in the late 1960s through the influence of an audiophile family member with exceptional hearing. This Japanese heritage fueled a brief but notable run of precision-engineered audio components before the brand shuttered its audio division amid the 1990s market downturn.
The brand focused primarily on amplifiers, producing standout series like the Alpha line of power amps from the late 1970s and early 1980s, and the high-end TRM series, including the 1975 TRM-800 integrated stereo amplifier with its robust 65 watts per channel output, NEC power transistors, and stability down to 4 ohms. Tuners such as the FAM-600 and compact hi-fi gear rounded out their compact-form-factor offerings, emphasizing clean circuit design and no-frills power over expansive categories like speakers, turntables, or modern digital components.
Today, Nikko holds a cherished position among vintage collectors, prized for its build quality and dynamic sound that rivals contemporaries from more prominent Japanese marques. Though limited in distribution during its era, these components endure as attainable high-fidelity treasures, evoking the golden age of Japanese amplification engineering.
See all Nikko listings on RADAR.
