Unison Research Unico Primo Integrated Amplifier AZ4 Purifi has taken a fresh

Purifi has taken a fresh look at every aspect of amplifier performance and found many seemingly small non-linearities that can make a dramatic difference in the overall sound

compatible with a wider range of equipment

sounds not pleasant any more

but not quite so musical

520B-V4 5V Filament with Balanced Heater Special version for improved bias scheme

Unison Research Unico Primo Integrated Amplifier AZ4 Purifi has taken a freshA perfect example of Italian style and design, the innovations contained in the Unico integrated amplifier designs are universally appreciated and recognized. The Primo is a stereo integrated amplifier that offers elegant lines and details, thanks to carefully considered surface finishes and proportions. Solid construction, careful selection of components and precise assembly are part of an almost artisan approach to amplifier design, reflecting our