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Harmonix RF-999M Million Isolation Devices Selling two sets of two so 4 cones in total. Plenty of reviews about these so I suggest potential buyers do a Google. The more high Rez the system the more they seem to make a difference. They are all in excellent condition and come complete in their original manufacturers box. They will be shipped from New Zealand where I live. Because I am new to this site I would understand if some people were reluctant to deal with me but if you are in doubt I am sure I could provide reputable business references from NZ who would vouch for my honesty an
Generating expert take…
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.
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