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This is a deal: at £400, it sits well below the £572 25th percentile for recent UK comparables, so it looks like a strong bargain versus the local used market. Against the £745 median, you’re saving a meaningful chunk, and it is nowhere near the £774 75th percentile.
That makes it an attractive entry point into a very well-regarded Hypex/Purifi-class amp module: clean, fast, low-distortion power with excellent control and a very “get out of the way” presentation. If the unit is complete and healthy, the upside is straightforward—reference-level performance per pound, with little reason to pay more unless you specifically need extras such as a known service history, box, or matching inputs.
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.
