SM-025 Monaural Power Amplifier
Signature Series

Amplifying Excellence

Stepping boldly beyond the acclaimed SM-011, the SM-025 Class A/AB monaural amplifier embodies Vitus Audio’s ceaseless pursuit of musical authenticity. Every facet of its design is calibrated meticulously, delivering more power, heightened resolution, expanded dynamics, and an exceptional silence that illuminates the subtlest musical nuances. Engineered as separate monoblocks, this dual chassis powerhouse reveals the innermost details of your recordings with startling clarity and effortless precision.

With a robust output of approximately 100 watts in pure Class A and surging dynamically to a formidable 400 watts at 4 ohms in Class AB, the SM-025 confidently drives even the most demanding loudspeakers. At its core lies a custom transformer boasting remarkably low losses (below 2%), coupled with a substantial capacitor bank of 180,000μF per channel. True balanced circuitry from input through to output and an uncompromising zero global negative feedback design ensure sonic purity without compromise.

Musical Truth, Engineering Precision

The SM-025 integrates advanced design principles originally developed for the celebrated SIA-030 integrated amplifier. Its newly scaled chassis is thoughtfully engineered to enhance airflow efficiency, safeguarding critical components and significantly reducing interference. Every detail – from the refined internal shielding to the meticulously arranged layout – is dedicated to a refined listening experience, free from distractions or technical artefacts.

Hans-Ole Vitus’s visionary design approach has again created a device that celebrates music’s intrinsic emotional depth and vitality. Far from the pitfalls of sterile sonic reproduction, the SM-025 reveals a vivid and holographic soundstage, marked by stunningly realistic dynamics. From intimate acoustic ensembles to expansive orchestral landscapes, the amplifier ensures an immersive listening experience, faithfully capturing the spirit and atmosphere of each recorded moment.

The SM-025 isn’t merely a sophisticated piece of audio engineering, it’s a profound statement of musical intent. For audiophiles who demand exceptional control, lifelike dynamics, and an emotional connection to their favourite music, this amplifier exemplifies the art of audio perfection.

Are you ready to transcend?

Finishing

The SM-025 comes in Pure White, Jet Black or Warm Silver as standard. Titanium Orange, Dark Champagne and Titanium Grey are our most popular unique finishes.

Technical specifications

INPUT (Each) XLR analogue RCA analogue

Available 1 1
Sensitivity 2 VRMS 2 VRMS
Impedance 10kΩ 10kΩ

OUTPUT (Each) Speakers

Available 1
Impedance 0.075Ω
Power WRMS (8Ω) ~50W Class A / ~200W Class AB
Power WRMS (4Ω) ~100W Class A / ~400W Class AB
Frequency response 5Hz-100kHz (filter on) / DC-100kHz (filter off)
Signal to noise ratio >110dB @ 1kHz
THD + noise <0.01%

POWER CONSUMPTION (Each)

Standby <1W
Class AB ~70W
Class A ~135W

DIMENSIONS (Each)

Height 177mm including feet
Width 435mm
Depth 436mm / 467mm with binding posts
Weight 38kg
Material Aluminium for body parts and heat sinks