Its 6X cheaper at $159, so that tells the tale there. Specs are not equivalent, so hard to compare and finally, its 5VDC input going to 12vdc internally, vs 15vdc going to 30vdc internally in the iPh3.
This baby is feature rich, ie balanced, bigger chassis, and a few auto features. IPh3 has more manual dip switch settings (fully configurable), more EQ settings, better power configuration internally, and will likely kick junior's ass interns of sonics. Junior is the bigger value play and has that Balanced output option but less tweakable.
The iPhono3 Black Label and the Zen Phono are fundamentally different products. iPhono3 Black Label, our premium phono-stage employs a trickle-down technology from the AMR PH-77, the $12,000 larger sibling with 23 equalisation curves, which remains the vinyl benchmark to this day. The tech used in the iPhono3 Black Label features the 6 most popular stereo EQ curves. The iPhono3 Black Label, like the AMR PH-77 from which it descends, enables you to set the precise load/gain for the cartridge you have. Squeeze every last drop of performance out of your precious pickup with the best audiophile components. Computer matched op-amps, high-gain bi-polar output transistors to Nichicon audio-grade capacitors are just some of the examples.
The Zen Phono is a one of a kind entry-level phono stage which features precise RIAA equalisation with balanced output. It is rather unparalleled to come across a phono stage with MM/MC from 36dB >72dB - 4 gain levels capability and a super-silent noise floor -151dBV at this price point. Moreover, it is equipped with an AI sub-sonic filter, addressing warps without eliminating bass or causing phase issues.