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Condition unknown makes this harder to call on cosmetics or completeness, but at £899 it is clearly ambitious versus your recent comp set: it sits above the £770 75th percentile and well over the £687 median, so this is not priced like a routine used buy. It may still be justifiable if the seller can document excellent provenance, recent checks, or a notably clean, complete package, but on price alone it is asking top-of-market money.
That said, the 1ET400A has a strong reputation for being compact, very efficient, and genuinely high-end in transparency and control, so a good example is worth having. For a Purifi-based amp, I’d want reassurance on channel balance, noise floor, and whether it includes the right power supply, casework, and any original packaging or service history; if those are present and the unit is near-mint, the premium is easier to understand, but it still needs to look especially tidy to earn £899.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Purifi Audio emerged from Denmark around 2017 as a research-driven venture founded by audio engineering luminaries Lars Risbo and Bruno Putzeys. Both pioneers in class D amplification—Risbo with his PCM-PWM innovations via Toccata Technology and Putzeys with his storied career—teamed up to push boundaries in distortion reduction. Rooted in the science-centric ethos of the Technical University of Denmark, the company formalized through subsidiaries like Purifi Transducer Technology, emphasizing fundamental R&D over consumer products.
The brand specializes in high-performance components rather than complete systems, focusing on advanced loudspeaker drivers and class D amplifier modules. Their Eigentakt control scheme powers modules like the 400W unit, achieving THD and IMD below -115dB across frequencies. These transducer and amp technologies target measurable excellence in linearity and efficiency, serving OEMs and DIY enthusiasts who integrate them into custom high-end builds.
Purifi occupies a niche boutique position in the high-end hi-fi market, revered by knowledgeable buyers for its uncompromising engineering and objective performance metrics. As a young Danish startup, it earns acclaim for revolutionizing driver and amplification tech, though it remains under the radar outside specialist circles, prioritizing innovation over mass-market presence.
See all Purifi Audio listings on RADAR.
