Vitus Audio SM-025 Doubles Power in Class A Amplifiers

Experience the evolution of Vitus Audio SM-025 monoblocks, now delivering twice the Class A power with a refined signature design and cutting-edge engineering.

A New Era for Vitus Audio’s Signature Monoblocks

If you’ve ever admired the craftsmanship of Vitus Audio, you’ll understand the excitement surrounding their latest offering — the Vitus Audio SM-025 power amplifier monoblocks. These beauties take the baton from the long-standing SM-011, a stalwart in Vitus’ Signature series for over a decade. While the SM-025 keeps the iconic Vitus aesthetic intact, it packs a serious punch under the hood with a thoroughly modernized design.

The first glimpses of these monoblocks appeared before mass production kicked off in mid-2026, so while technically not a fresh-off-the-shelf newcomer, the SM-025 is anything but a mere update. It inherits some of the high-end engineering magic from Vitus’ flagship integrated amplifier, the SIA-030 integrated amplifier, reimagined for this power-focused role.

From SM-011 to SM-025: Twice the Class A Power

The SM-011 was a game-changer in 2014, pioneering surface-mount components in the output stage and supporting versatile output modes like Rock and Classic, initially designed for the MP-S201. The SM-025 embraces this legacy but dramatically expands on it with a larger platform and a fully revamped output stage.

What’s truly thrilling is the power boost: the SM-011 delivered about 25 watts per channel at 8 ohms in pure Class A, and 50 watts at 4 ohms before switching to Class AB. The SM-025 nearly doubles these numbers, boasting roughly 50 watts at 8 ohms and 100 watts at 4 ohms in pure Class A mode. When pushed into Class AB, it cranks up to a hefty 200 watts at 8 ohms and an impressive 400 watts at 4 ohms.

Innovations Behind the Power Surge

You might think doubling power means simply pumping up the idle current, but Vitus took a smarter approach. The power hike comes from a new output stage scheme combined with an optimized internal layout. The chassis grew taller — from 135 mm to 177 mm — while keeping the same width of 435 mm. This extra breathing room enhances airflow, shielding, and isolation of the amplifier’s critical parts.

Weight-wise, each monoblock tips the scales at 38 kg, just a bit heavier than its predecessor’s 36 kg, hinting at the dense, quality engineering packed inside.

The power supply is a marvel in itself: a custom 1.4 kVA transformer teamed with a capacitor bank totaling 180,000 µF per monoblock. For comparison, the older SM-011 had 240,000 µF, indicating that this isn’t just about bigger capacitors but a whole new power architecture. The SM-025 features a fully balanced design from input to output — no shared negative feedback loops in sight.

Connectivity and Sound Specifications

On the rear panel, you’ll find both balanced XLR and unbalanced RCA inputs, along with a single pair of speaker terminals. Both inputs have a sensitivity of 2 V RMS, a 10 kΩ input impedance, and an output impedance of just 0.075 Ω.

The signal-to-noise ratio surpasses 110 dB at 1 kHz, and total harmonic distortion plus noise (THD+N) stays impressively below 0.01%. Frequency response stretches from a deep 5 Hz to 100 kHz with the filter active, and from DC (0 Hz) when it’s off, promising a transparent, full-spectrum audio experience.

Finishes and Pricing

Vitus Audio offers the SM-025 monoblocks in the classic finishes of Pure White, Jet Black, and Warm Silver. If you’re looking to stand out, optional colors like Titanium Orange, Dark Champagne, and Titanium Grey come at an extra cost.

For those ready to invest, a pair of these monoblocks is priced around €55,000 in Europe and approximately $68,250 in the United States — a premium indeed, but one befitting the pinnacle of Class A amplification.

"The SM-025 isn’t just about power; it’s about refining every aspect of the amplifier to achieve sonic purity and effortless control."
— Vitus Audio Engineering Team

From Classic Roots to Cutting-Edge Sound

The Vitus Audio SM-025 monoblocks are a testament to how timeless design and modern engineering can coexist beautifully. For longtime fans of the brand, they represent a significant leap forward without losing the essence of what made the SM-011 a beloved classic. It’s about delivering uncompromised Class A power with meticulous attention to detail — something that hardcore audiophiles will appreciate deeply.

FAQ

• What makes the SM-025 different from the SM-011?
  The SM-025 doubles the Class A power output, features a redesigned output stage, improved internal layout, and a new power supply architecture.
• Can the SM-025 operate in both Class A and Class AB?
  Yes, it can run in pure Class A up to 50W (8 ohms) and 100W (4 ohms), with Class AB power reaching 200W and 400W, respectively.
• What kind of inputs does the SM-025 support?
  It has balanced XLR and unbalanced RCA inputs, both with a sensitivity of 2 V RMS.
• How heavy are these monoblocks?
  Each SM-025 weighs 38 kg, slightly heavier than the previous model due to enhanced components and construction.
• What are the finish options available?
  Standard finishes include Pure White, Jet Black, and Warm Silver, with optional colors like Titanium Orange and Dark Champagne available for an extra fee.

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