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At US$900, this sits just above the median US$875 and below the 75th percentile US$975, so it reads as fair-to-solid rather than a bargain. It is close enough to the core of the market that a buyer should judge it on condition and completeness more than on price alone.
That makes sense for a Purifi 1ET400A, which is widely respected for clean, low-noise, high-control amplification and a very transparent, “gets out of the way” presentation. If the unit is tidy, fully functional, and comes with the right power supply, casework, and any needed cabling, this is a sensible used buy with little downside; just confirm the exact build and included accessories before jumping, since those details matter more than cosmetic perfection here.
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.
