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Offered is „SIGMAS V5 7 fach Netzfilter“ by IsoTek Power Systems Ltd. as exhibit from the category „Cable, Power Distributor + Filter“ on audio-markt.de - the online market place for high-end. The advert with the number 9414323507 ends on 25.10.2026 at 13:10 o'clock.
Ambitious ask. At €3,590, this sits well above the recent used median of €1,131 and even above the 75th percentile of €2,038, so it needs to justify itself with exceptional provenance, completeness, or a notably serviced condition to feel fully in line with the market.
That said, this is a serious power conditioner with a strong reputation for cleaning up noisy mains, lowering hash, and letting a system sound more controlled and relaxed. For a buyer who specifically wants a high-end mains solution, the appeal is real; just make sure the listing includes the right sockets/cables, confirms full working order, and ideally offers a clean, well-documented history, because at this level the value is in condition and confidence as much as the unit itself.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
IsoTek, founded in 2001 in England by Keith Martin, emerged from a focused mission to combat poor mains power quality that hampers hi-fi performance. Martin's vision drove rigorous research into power optimization, establishing the brand as a pioneer in delivering clean electricity to audio systems. From its inception, IsoTek has prioritized innovation, with products manufactured in Europe to ensure durability and precision.
The company specializes exclusively in power conditioning solutions, including highly specialized mains conditioners and enhancement power cables. These components actively filter and purify electricity from wall sockets, benefiting amplifiers, source components, turntables, and home cinema setups without altering core audio gear categories like speakers or DACs. This narrow focus allows IsoTek to offer scalable upgrades across budgets, from entry-level to reference-grade systems.
IsoTek commands a premium position in the high-end hi-fi market as the recognized leader in clean-power technology, trusted by over 100,000 customers in 45 countries and endorsed by brands like Arcam, Marantz, and Nordost. Hundreds of awards from audio critics affirm its reputation for transformative sound improvements and equipment protection, appealing to discerning enthusiasts seeking measurable performance gains.
See all IsoTek listings on RADAR.
