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Offered is „TU 666 M“ by Harmonix as second-hand device from the category „HiFi-Tuning-Accessory“ on audio-markt.de - the online market place for high-end. The advert with the number 5037782811 ends on 18.11.2026 at 10:42 o'clock.
With 97 recent comparables, the €750 asking price sits comfortably below the €934 median and a bit above the €693 25th percentile, so this reads as a solid, buyer-friendly price rather than a stretch. It’s not quite a steal, but it is clearly on the sensible side of the market for this kind of used Harmonix piece.
That makes it worth a close look, especially if the item is clean and complete. Harmonix accessories and tuning pieces are usually bought for subtle system refinement, so condition and originality matter more than flashy specs; if this one is well kept, the price leaves room to enjoy it without feeling like you overpaid.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Harmonix is not a recognized brand in the hi-fi or consumer-audio sector. Extensive searches yield no verifiable information on a company by that name producing amplifiers, speakers, turntables, DACs, headphones, cables, or related equipment. The closest matches are unrelated entities: Electro-Harmonix, an American effects pedal maker founded in 1968 by Mike Matthews, focused on guitar fuzz, phasers, and delays like the Big Muff Pi; and Harmonix Music Systems, a Boston-based game studio from 1995 known for Rock Band and rhythm games, acquired by Epic Games in 2021.
Without confirmed details on origin, products, or market position for a hi-fi Harmonix, any description would rely on speculation, which cannot be provided. Knowledgeable buyers should note that obscure or boutique hi-fi brands often require direct verification from manufacturer sites or industry directories, as generic searches frequently confuse them with guitar effects or gaming firms.
If this refers to a specific Japanese cable or accessory maker sometimes called Harmonix (e.g., Harmonix Reimyo), details remain unconfirmed in available sources, positioning it as niche rather than established hi-fi. For accurate intel, consult specialist audiophile forums or retailers.
See all Harmonix listings on RADAR.
