Vitus SS-025 Stereo Power Amplifier

Vitus SS-025 Stereo Power Amplifier

The Vitus SS-025 is the Signature Series stereo power amplifier — a compact but uncompromising design that packs the engineering philosophy of Vitus Audio's larger separates into a single chassis without asking you to sacrifice anything that matters. It shares its core design principles with the SIA-025 integrated and the SM-011 monoblocks: zero global negative feedback, true balanced topology throughout, and a commitment to running every component well within its limits.

SMD Circuit Integration

The SS-025 uses surface-mount device components in place of leaded components wherever the design allows. This is not a cost-driven decision — it is an engineering one. SMD construction allows Vitus to achieve higher-density layouts and shorter signal paths within a more compact chassis than conventional leaded designs would permit, without compromising the quality of what sits inside.

Zero Global Negative Feedback

The SS-025 applies zero global negative feedback. This is a deliberate and demanding design choice: rather than using a feedback loop to correct non-linearity after the fact, the circuit is engineered to be inherently linear from the outset. The audible result is an amplifier whose character is a direct, unmediated expression of its circuit — nothing added, nothing corrected away.

True Balanced Topology

The signal path runs fully balanced from input to output. True balanced design — as opposed to pseudo-balanced — maintains common-mode noise rejection across the entire signal chain, and it is the correct architecture for an amplifier at this level operating in a complex system.

Custom UI Transformer

At the heart of the power supply sits a custom UI transformer specified for a low open-to-closed-loop voltage drop. This translates to better control, stronger low-frequency performance, and a quieter noise floor — the kind of foundation that reveals itself not in measurements alone but in the composure the amplifier maintains under dynamic load.

25% Component Loading Rule

No component in the SS-025 is asked to deliver more than 25% of its rated capability. This is a design philosophy with a straightforward consequence: components operating well within their limits run cooler, behave more linearly, and last considerably longer. It is the difference between an amplifier built to perform on the day and one built to perform for decades.

Modular Architecture

The SS-025 is designed around a fully modular architecture. This means the amplifier is not a closed proposition — future upgrades can be accommodated within the existing chassis, protecting your investment as Vitus Audio's engineering evolves.

Finishes

Standard finishes are Pure White, Jet Black, and Warm Silver. Popular unique finishes include Titanium Orange, Dark Champagne, and Titanium Grey. Bespoke internal configurations and colour finishes are available on request.

Who Is It For?

The SS-025 is for the audiophile who wants Signature Series engineering in a stereo configuration — those who have a suitable preamplifier and want a dedicated power amplifier that will not be the weakest point in an otherwise resolving system. It suits listeners who value circuit purity and long-term reliability as much as headline output figures, and who are building a system intended to last.

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.

Contact us at info@martinshifi.co.uk, 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.

Also from Vitus: Vitus RI-101 MK2 and Vitus RP-102 Phonostage.