Cambridge Audio Alva Solo

Cambridge Audio is a long-established British brand, and the Alva line is its proposal for modern vinyl. The Alva Solo is the entry phono stage of the range: it does one thing — moving magnet — and does it with care, betting on construction rather than on functions.

In our ranking of phono preamps under £200 it sits fourth, but the order does not measure build quality: it measures how far a preamp carries you, from the most versatile to the most finely made. The Alva Solo sits at the "finely made" end — the best built, the least flexible.

This is where the Alva Solo stands apart from the others, at least on paper. Cambridge states a brushed aluminium front panel, a switch-mode power supply to reduce hum and a low-noise surface-mount circuit. The figures from the official spec page: 39 dB of gain at 1 kHz, 300 mV nominal output, 47 kOhm input impedance, RIAA accuracy within ±0.65 dB from 30 Hz to 20 kHz, THD+N below 0.0025% and a signal-to-noise ratio above 90 dB.

Two details set it apart, both rare in the class: an always-on subsonic filter, which removes the low-frequency rumble of worn or warped records while protecting the speakers, and above all a balance control that lets you correct small level differences between the channels of a cartridge — a function usually found only on far dearer machines. It powers down on its own after twenty minutes of inactivity.

The sound character on this page does not come from our own listening. For the Alva Solo we could not find a published professional review that we could read and cite: for this reason the page does not describe its sound and stops at the specifications, which come from Cambridge Audio's official page.

On vinyl its two aces work on concrete problems. The subsonic filter, always engaged, keeps the rumble of tired records in check and protects the woofers from pointless excursions. It is less "intelligent" than the iFi's — it does not distinguish the movement of the warp from the musical content in the same way — but it does its job.

The balance control is the touch that surprises: if a cartridge has slightly unbalanced channels, or if the room pulls more to one side, you correct it here instead of living with it. It is the kind of refinement that betrays Cambridge's care for the object. The limit, declared, is that the Alva Solo is MM only: with a moving-coil cartridge there is nothing you can do.

Here it must be explained why the Alva Solo, though it has the highest build score of the group, is fourth in the ranking. The comparison is with the three phono preamps ahead of it. The iFi ZEN Air Phono 2 (first) costs less (~£149 against ~£180) and does much more — MM and MC, adjustable gain, an intelligent subsonic filter — so it follows you as the system grows; the Alva Solo does not, it stays fixed on moving magnet. The Pro-Ject Phono Box E (second) is far cheaper and is the honest entry point. The Rega Fono Mini A2D Mk2 (third) costs less and adds a USB output for digitising records, a function absent here.

A note of transparency on the scores: on the mean of the four criteria the Alva Solo (7.3) comes out above the Phono Box E (6.9), while ranking below it. It is not a contradiction: the ranking orders by versatility and by "how far it carries you", not by build quality. The Alva Solo is better made and has two more functions, but it is the least versatile and the most expensive — which is why, in a ranking that rewards flexibility, it sits at the bottom. Its place is clear: the choice for those who will stay on MM and want the better object, not the more adaptable one.

Like any phono preamp, the Alva Solo is for those with a turntable without a phono stage and an amplifier without a phono input — the most common situation with modern amps. It sits between the cartridge and the line input, and a typical use is to bypass the built-in phono stage of a turntable like the Audio-Technica LP120X, connecting its output to the Alva Solo.

In our turntable ranking you will find several MM-cartridge models that pair well with it. The one constraint to keep in mind is compatibility: being MM only, it should be chosen knowing it will not follow a later move to a moving coil — there you would need the Alva Duo or an MM/MC preamp like the iFi.

A note on availability outside Italy: the Alva Solo is not on the generalist channels — neither Amazon nor eBay with clean stock — and is found mainly through specialist hi-fi dealers. It is not a fault of the product, but it is worth knowing before you go looking for it.