Introducing Rega's new AOS Phono Stage

Feb 27th 2026

Rega used the Bristol Hi-Fi Show 2026 to unveil a new addition to its premium analogue lineup: the AOS MC phono stage, a moving-coil-only design that borrows heavily from the company’s five-star Aura MC reference model—just at a more approachable price point.

AOS: A "trickle-down" phono stage from Rega’s flagship

If you’ve ever looked at the Aura MC and thought “that’s the one… if only,” the AOS MC is essentially Rega’s answer. The company describes the AOS as a “no compromise” moving coil pre-amplifier whose circuit design is based heavily on the Aura’s topology and layout—aiming to get listeners closer to that reference performance without stepping into cost-no-object territory.

In Rega’s phono stage range, the AOS MC lands squarely between the Fono MC MK4 and the Aura MC, positioned for serious vinyl listeners who want high-end engineering but don’t necessarily need the flagship.

Pure analogue, deliberately simple

Rega leans hard into the “keep it analogue” philosophy here. The AOS MC is a two-stage, all-analogue amplifier with no digital control circuitry in the signal path—so no screens, menus, or software layers between cartridge and system.

At the heart of the design is a symmetrical, complementary Class A amplifier using parallel, low-noise FETs configured as compound pairs. The reason for choosing FET devices is especially relevant for moving coil cartridges: Rega highlights that this approach prevents bias current from flowing into the cartridge coil, which helps avoid disturbing the cartridge’s magnetic geometry—an elegant “do no harm” principle when the signal you’re amplifying is vanishingly small.

Rega also includes a self-adjusting servo to compensate for temperature drift and keep operation stable over time—another detail that reads like genuine reference-model DNA rather than feature-list padding.

Real-world flexibility for MC cartridges

While the AOS MC is clearly engineered with Rega cartridges in mind, it’s also built to accommodate a wide range of moving coil designs through practical loading and gain options.

Adjustments are handled via rear-panel switches rather than digital interfaces:

Resistive loading: 70, 100, 150, or 400 ohms
Capacitive loading: 1000 pF or 4300 pF
Gain: a 6 dB toggle (69.3 dB or 63.5 dB)

On paper, Rega also publishes ambitious measured targets, including RIAA accuracy better than ±0.2 dB (65 Hz–70 kHz), frequency response extending to 100 kHz, and THD quoted at 0.03%. Those specs aren’t just bragging rights—they point toward the kind of headroom and precision that helps phono stages sound open, stable, and unforced.

Compact casework, smart power behavior

Physically, the AOS MC arrives in a custom half-width aluminium chassis—compact, purposeful, and designed for RFI shielding, which matters when you’re amplifying microvolt-level signals. Dimensions are listed around 8.7" × 3.1" × 13", with a weight of about 6.4 lb. Connectivity stays strictly traditional with RCA in/out.

There’s also an automatic standby mode intended to reduce power consumption when idle (and it can be disabled via switches for those who prefer leaving analogue gear powered continuously).

Price and availability

In the UK, the AOS MC is priced at £1500, (US pricing will be available soon), and shipments beginning in the UK first, with export units following in the weeks after. As we get nearer, we'll be able to provide a better window for United States arrival and availabilty in hi-fi shops across the US.

The takeaway

The AOS MC feels like Rega doing what it does best: distilling reference-level thinking into a focused, performance-first component—analogue to the core, adjustable where it matters, and intentionally free of distractions. If the Aura MC is the “ultimate” expression, the AOS MC looks set to become the sweet spot: a serious moving-coil phono stage built for listeners who want flagship heritage without flagship pricing.