Cyrus PSX-R2

The PSX-R2 is an external power supply for compatible Cyrus components. It is not a flashy addition — you will not see it, and it adds no new inputs or features to your system. What it does is remove a fundamental constraint: the power supply inside any amplifier or source component shares space, budget, and circuitry with everything else in that box. A separate, dedicated power supply does not.

The PSX-R2 has been in the Cyrus family for over 30 years in various forms. This v2 edition incorporates power supply filtering drawn from the Cyrus Anniversary system — a meaningful lineage. The principle has not changed: isolate the power supply, regulate it properly, and the component it feeds can work as its designers intended rather than as the constraints of a shared enclosure allow.

300VA Toroidal Transformer

The front end of the PSX-R2 is a 300VA toroidal transformer. The VA rating reflects its current delivery capability — this is not an undersized unit. Behind it sit 30,000 microfarad slit foil reservoir capacitors. Slit foil construction gives low equivalent series resistance (ESR) and wide bandwidth, which matters because a capacitor with high ESR cannot respond cleanly to sudden demands for current. The capacitors feed a linear mode regulator stage that delivers an extremely smooth, stable DC output.

The result of this engineering is a power supply that does not flinch. Whatever the partnered component demands — a dynamic musical passage, a sustained high-current draw — the PSX-R2 provides a consistent, clean feed.

Instant Upgradability

No modifications are required to connect the PSX-R2 to a compatible Cyrus component. Power both units down, connect them, and power back on. Internal circuitry in both units detects the connection and adjusts automatically — output and input parameters reconfigure themselves without any manual intervention. It is, in practice, a five-minute upgrade.

Compatible products are those in Cyrus's core hi-fi separates range where the circuits have been specifically designed to benefit from an external power supply connection. If you are unsure whether your Cyrus component is compatible, it is worth asking us before purchasing — we will tell you plainly.

What It Does to the Sound

Cyrus describe the benefit in terms of fine detail and the subtle emotional nuances of a performance — the kind of low-level information that a stressed or noisy power supply obscures. In our experience, a well-implemented separate power supply does exactly that: it lowers the noise floor in a way that allows the source component to retrieve and resolve detail it was previously suppressing. The improvement is not always dramatic on first listen; it tends to reveal itself over time as you notice things you were not hearing before.

That is worth keeping in mind when evaluating the PSX-R2. It is not an upgrade that changes the character of your system. It is one that allows your system to be more fully what it already is.

Who Is It For?

The PSX-R2 is for the Cyrus owner who has a compatible component and wants to extract more from it without changing it. If you own a Cyrus Classic AMP or Cyrus Classic Stream and feel the system is performing well but want to go further, the PSX-R2 is the logical next step. It is also worth considering alongside a new Cyrus purchase — buying the PSX-R2 at the same time as the component it will partner is a sensible way to plan a system with an upgrade path already built in.

It is not for those who have not yet optimised their speaker placement, cabling, or room acoustics. Sort those first. The PSX-R2 rewards a system that is already well set up.

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 PSX-R2 is available to hear in our Norwich showroom, partnered with compatible Cyrus components so you can judge the difference for yourself.

When you get in touch, you'll be speaking with Dave, Chris and Tim — experienced specialists who can advise on this product and your whole system.

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.