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At £507, this looks very strong versus the usual used Echo Mk II market, which tends to sit well above that level and was being discussed around roughly £800 new in one review context. For a well-regarded Feliks OTL amp, that puts this asking price comfortably in bargain territory rather than merely “fair.”
What makes it appealing is the classic Echo formula: a hand-built tube OTL design with a naturally spacious, smooth presentation and particularly good synergy with high-impedance headphones, which is exactly where these Feliks amps earn their reputation. If the unit is clean, fully functional, and includes the right tubes/accessories, this is the sort of listing that makes sense for someone building a serious dynamics-focused setup; just verify it’s not being bought for low-impedance planars, where OTL amps are usually a poor match.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Feliks Audio traces its roots to Poland, where electronics engineer and audio enthusiast Henryk Feliks began designing amplifiers over 40 years ago as a passionate hobby. Around 20 years ago, he turned this pursuit commercial, selling custom-made units initially within Poland. In 2014, the second generation—sons Łukasz, Piotr, and Michał—joined the family business, elevating it into a global operation based in Lubliniec. Today, this tight-knit team of about 10 crafts products with over 25 years of accumulated expertise in tube amplification.
The brand specializes exclusively in handcrafted tube amplifiers, with a sharp focus on headphone applications. Their lineup includes output transformerless (OTL) designs like the accessible Echo, high-end models such as the Envy Susvara Edition, and even esoteric electrostatic amplifiers like the Bliss, which supports both modern and vintage headphones. Every piece is in-house engineered, tuned, and assembled, blending natural materials and unique topologies for purist performance, often doubling as preamps for active speakers.
Feliks Audio occupies a niche boutique position in the high-end hi-fi market, revered by headphone aficionados for its emotional, rewarding sonics that prioritize musicality over sterile precision. Distributed in over 20 countries through select channels, their four-figure pricing reflects premium, small-batch quality rather than mass-market volume, appealing to discerning buyers who value tradition-meets-innovation in tube-driven headphone amplification.
See all Feliks-Audio listings on RADAR.
