AUDIOPHONICS HPA-Q400ET 4-channel Class D amplifier Purifi 4x400W 4 Ohm - reviews - There are 4 reviews.

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a potential game changer
I've been a fan of Bruno Putyz and his designs for many years and consider him a pioneer of Class D. Hypex, N-core have been adopted by so many high end manufacturers NAD, Bel Canto etc etc. I was very excited when Purifi announced eigentakt. Even more so when audiophonics packaged it so attractively and affordably for the enthusiast with the well proven Hypex SMPS power supply. An immediate buy. I love building but dont have the machinery or time for nice casework.
Comments. Excellent build quality in and out. If you want pretty spend another 5k.
initially disappointed with sound compared to Nord n core monblocks with hardy discrete amps.
Immediately looked at lm4652 (see other reviews) and replaced with sparkos discrete dual opamps. A revelation. up there with the very best. This is super audiophile at bargain basement prices.
Tres bien. Merci beaucoup.
NM

Excellent value
Excellent multi-channel amp powered by purifi amp modules. Even has functionality (adjustable-gain, buffer bypass) that are not found on higher end models. The only downside is the lack of a remote controlled power switch.

Parfait pour la multiamplification
les modules purifi sont ce qui se fait de mieux avec les modules Ncore 40à en classe D.
Cet ampli ne chauffe pas (essayé en stéréo 2 voies uniquement) et est très transparent. Seul regret , pas d'entrée RCA (mais il n'y a pas trop la place à l'arrière, il est vrai)