Phonostages — Soulution Audio 550 phono

The 550 phono is a phono stage from Soulution Audio, sharing the 350's low output impedance with a somewhat different MC loading range. The 550 phono brings Soulution's uncompromising engineering to dedicated phono preamplification.

Key specs that matter

Two single-ended inputs are provided. MC current-sensing input impedance offers a stepless range of 10-100 ohms, or 47,000 ohms for MM. Output impedance is a remarkably low 10 ohms. Gain is 55dB for MM or 66dB for MC. Frequency response spans an exceptionally wide 0Hz to 1,000,000Hz within plus-or-minus 3dB. Total harmonic distortion plus noise is under 0.002%. At 442 x 143 x 448mm and 20kg, the 550 phono represents a more substantial commitment than the 350 phono stage.

Sound and use context

Expect exceptionally clean, precisely optimisable phono-stage performance reflecting the exceptionally wide 0Hz-1MHz bandwidth combined with the low 0.002% distortion figure, consistent with Soulution's broader uncompromising engineering philosophy.

Pairing

The stepless 10-100-ohm MC loading range accommodates a range of moving-coil cartridges precisely.

Alternatives

Soulution's own 350 phono stage offers a more compact alternative with a wider MC loading range within the same broader catalogue.