Vitus SP-103 Phonostage

The SP-103 is Vitus Audio's Signature Series phonostage — a two-chassis design that represents the most significant advance in the Signature Series phono lineage since the SP-101 first established Vitus Audio's reputation in this area, and one that sets a new standard for analogue source amplification at this level. Built on technologies developed during the creation of the Masterpiece Series MP-P201, the SP-103 is not an incremental update to its predecessor — it is a fundamentally new design of extraordinary transparency, musical authority, and flexibility, one that reveals what a fine cartridge and tonearm combination is genuinely capable of delivering.

Two-Chassis Design

The SP-103 separates its power supply unit and signal unit into two dedicated chassis, connected by a purpose-built umbilical. This separation is not a cosmetic statement of intent — it delivers a measurable and audible reduction in power supply noise in the signal chain, and allows each chassis to be optimised for its specific function without compromise to the other. The result is a noise floor that is extraordinary even by the standards of reference-level phonostages, and a signal path of purity that single-chassis designs at this price point cannot match.

Technologies from the Masterpiece Series MP-P201

The SP-103 incorporates technologies developed during the creation of the MP-P201 — Vitus Audio's Masterpiece Series phonostage and the most advanced phono preamplifier the company has produced. The development of the MP-P201 involved extensive refinement of every element of the phono amplification chain, and the insights gained from that process have been applied throughout the SP-103's design. The result is a Signature Series phonostage that benefits directly from Masterpiece Series engineering — a genuinely extraordinary achievement at this price point, and one that narrows the distance between the two ranges to a degree that will surprise anyone who auditions both.

Fully Balanced, Fully Discrete Architecture

The SP-103 is built around a fully balanced, fully discrete circuit from input to output — no integrated circuits anywhere in the signal path. This is a design philosophy that demands exceptional engineering discipline and component matching, but delivers a transparency, timing integrity, and musical flow that integrated circuit-based designs consistently fail to replicate. Every stage of the SP-103's signal path has been designed and built to the same standard as the MP-P201 — the difference between the two products is one of degree, not of kind.

Flexible Gain and Loading

The SP-103 provides an exceptionally flexible gain and loading structure, allowing precise optimisation for cartridges with output voltages ranging from 125µV to 10mV — a range that encompasses virtually every moving coil and moving magnet cartridge currently in production. Gain and loading can be adjusted via the RC-010 systems remote or directly from the front panel, allowing real-time adjustment during listening without disturbing the signal path. The gain steps have been calibrated by scanning the full range of cartridges available at the time of design, ensuring that the resolution of each step is as fine as possible across the full range of cartridge outputs.

Who Is It For?

The SP-103 is for the listener who has made a long-term commitment to vinyl replay at the highest level — who has a cartridge and tonearm combination worthy of what the SP-103 can reveal, and who wants a phonostage that will remain the definitive reference in their system indefinitely. It partners naturally with Vitus Audio Signature Series amplification — the Vitus SIA-030 as an integrated solution, or the Vitus SS-025 and Vitus SM-103 MK2 as a separates system of unrivalled coherence. For those also considering a digital source of equivalent ambition, the Vitus SD 025 MK2 is the natural Signature Series partner.

Buying from Martins Hi-Fi

Martins Hi-Fi has been in Norwich since 1968. Elizabeth Gould runs the business today, and we stock only brands we have heard properly and stand behind. The SP-103 is available to audition at our Norwich showroom — speak to Dave or Chris, who can demonstrate it with a range of cartridge and tonearm combinations and guide you through gain and loading settings for your specific setup. A phonostage at this level is a statement purchase, and we will ensure you hear it properly before committing.

Contact us at [email protected], call 01603 627010, or WhatsApp on 07554 687137. You can read more about how we work on our Why Martins Hi-Fi page. We are at 85–91 Ber Street, Norwich, NR1 3EY.