The Fosi ZP3 preamplifier completed my fully balanced system.
The sound quality is amazing for the money, the ZP3 sound is neutral without being too dry, transparent enough, with exemplary resolution for a the budget range. What I really like is the bass control and dynamics, especially on the hi-rez files that have a higher dynamic range. ZP3 presents the soundstage correctly, with correct positioning of the sound sources in space, without exaggerating or compressing the width of the stage, or the depth. This is almost on par with my E88CC unbalanced tube preamp - a mu-Follower configuration with capacitor output and mild NFB - except for the apparent 'naturalness' of the tones of natural instruments and human voices, otherwise the Zp3 has the edge on any other chapter!
On the audio tracks with a Dynamic Range more than 10, the modern recordings with avant-garde jazz, contemporary classical music or full scale orchestral works could sound 'scary' in a healthy impressive manner. Some music albums examples here, that I used to evaluate the SQ of my ZP3 unit:
- Mussorgsky: 'Pictures at an Exhibition'; Gürzenich Orchestra Cologne, Dmitrij Kitajenko; 2019 [Oehms]
- Mats Eilertsen Trio: 'Sails Set'; 2013 [Hubro]
- Jonathan Faralli: 'Percussion XX'; 1999 [Arts]
- Bach|Gubaidulina, Anne-Sophie Mutter: Violin Concertos | In Tempus Praesens; 2017 [Deutsche Grammophon]
- Aaron Copland: Orchestral Works CD1; 1996 [Decca]
My unit came with LME49720 opa factory installed, to my surprise, and I left it how it is, after briefly testing AD8599, which proved not to be on par with the LME chip.
This preamlifier is a keeper for those loving a neutral - studio like sound - transparent, decently detailed and dynamic sound, that faithfully reproduce the recordings as god as they are, and do not bother the lack of a volume control display. The remote set provided inside the package is quite handy, and works well from all angles, having enough power, like any decent remote.
Despite ordering my unit was was not on stock, the Audiophonics announcements, packaging and tracking service was exemplary: merci a vous !
My audio set consists in: custom balanced DAC with AKM4499; Fosi ZP3; Fosi V3 Mono x 2; 2way custom made passive 98dB sensitive speaker with Beyma 15LX60V2 low-mid driver and Beyma CD10 Nd compression driver in a Polish horn SEOS15 by Autotech, with 2-nd order crossover implemented with CD passive equalization.
Will give it 4 stars out of 5, because:
- lacking of a volume display
- it is advertised to allow the customer to easily swap the 2 output opamps, which in practice is almost impossible for a less skilled owner, as the black glossy acrylic decorative sheets from the L/R case sides are very hard to remove in order to reach the 4 screws of the aluminum side plates of the case (are attached with double-sided tape)
- on balanced mode, the volume control chip does enter in a kind of soft mute mode, especially when the unit is freshly started, a mute and un-mute sequence from the remote set being the cure. I do not find this normal, but it does not affect the SQ so far after the 'fix'.