Phono Preamplifiers

Joining Nagra’s monoblock power amps, preamp and DAC X separates in its HD (High Definition) line, the two-box HD Phono channels the brand’s 70+ year audio heritage

With the HD Phono, Nagra has joined a rather select group. By my estimation, there are but a half-dozen manufacturers of phono stages costing above £50,000. At a heady £68,500, the all-valve Nagra HD Phono is about as expensive and exclusive as it gets, and for that amount of money you expect to get everything. And you do.

Dutch tube aficionado, PrimaLuna, has offered an optional solid-state phono module with its amps for years, but now comes its first standalone, all-tube MM/MC preamp

With vinyl sales now surpassing CD, the revival is back with such force that the flood of phono stages and decks will surely continue unabated. More than that, it's enough for PrimaLuna to show its confidence in analogue to bring out its first EVO phono amp, the EVO 100 Tube Phono Preamplifier at £3398.

Primare's 'Prisma push' may have focused resources into network-enabling its amplifiers and CD players, but its new flagship phono pre proves its love of vinyl has not waned

Even the most ardent vinyl enthusiasts will admit that they can get bamboozled by the whole process of cartridge loading and gain matching. Some MMs and MCs can be quite particular about the load resistance and capacitance that they 'see', just as most phono stages will have a 'sweet spot' gain setting that varies from pick-up to pick-up. So there's a great deal to be said for a flexible phono stage that offers numerous adjustments. On the other hand I can appreciate the popularity of designs where the complexity extends to nothing more than an MM/MC switch!

Moving-coil pick-ups are inherently 'balanced' and Pro-Ject is determined to reveal them at their best with this balanced-wired version of the X2 deck and phono preamp

One burning question is begged by the arrival of Pro-Ject's X2 B turntable and Phono Box S3 B phono stage: why did it take so long for the industry to simplify a balanced vinyl-playing front-end? It's not like balanced operation wasn't adopted by high-end listeners decades ago as superior to single-ended for both line-level sources – DACs and top-flight CD players – and pre-to-power amp connections. MC cartridges are inherently balanced. So why the wait?

While there’s little that’s grand looking about RCM Audio’s Sensor Prelude phono amplifier, despite it costing considerably in excess of a grand, close inspection reveals that it has been purposefully designed. A substantial brushed alloy fascia disguises what is otherwise a rather utilitarian metal case. But there’s little to complain about its construction quality, other than the cheapness of the stuck-on rubber feet. A separate power supply box connects via an umbilical cable of fixed length and locking DIN connector while the cable is generous in length to allow remote placement.

From Japan's Soulnote comes one of the most flexible phono preamps ever developed – RIAA, plus no fewer than 144 legacy playback curves, and support for 'optical' pick-ups!

In the quest for a universal phono stage, designers have to accommodate all manner of cartridges, but for most of us they fall into just two categories: moving-coil (MC) and moving-magnet (MM). Even within those types, however, there are plenty of variants such as moving-iron, moving-flux, whatever you call Deccas, both high- and low-output MCs and even low-output MMs. The list is endless, but Soulnote's E-2 phono amplifier handles all of the above configurations plus DS Audio optical cartridges via a built-in energiser and equaliser.

Matching clever technology with exacting build, the Trilogy is an engaging performer. Superbly put together, the Trilogy 907 is machined out of a solid billet of aluminium. Its made-tohide- away outboard supply shares the same footprint and needs to be separated by at least 250mm, with allowance for ventilation. It elicited sighs of admiration from audiophiles to whom we was showed it.