Ultrafide Audio isn’t a brand that grew out of lifestyle speakers or streaming radios. Its DNA comes straight from the professional world—live sound, studio systems, and the kind of amplification that has to work hard, sound clean, and never fail under pressure. Now, that same engineering approach is landing squarely in the living room with the brand’s first integrated amplifier, the ENSO INT-125.
This isn’t just a power amp with a volume knob. The ENSO is designed as a complete, flexible control center—an integrated amplifier that borrows heavily from pro-audio design principles while staying firmly rooted in the needs of serious home listeners.
The Ultrafide ENSO INT-125 features a minimalist 17-inch chassis with a central OLED display, precision volume control, and internal UltraSigma output stage delivering 2 × 125 watts into 8 ohms from a linear toroidal power supply.
Power and topology
At the heart of the ENSO sits Ultrafide’s UltraSigma output topology, a design derived from the company’s professional amplifiers. The numbers are reassuringly serious:
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2 × 125 watts into 8 ohms
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2 × 250 watts into 4 ohms
That puts it in the sweet spot where it can comfortably drive demanding floorstanders while still maintaining control, headroom, and dynamic punch.
Instead of relying on switching supplies or lightweight designs, Ultrafide uses a linear toroidal power supply, a choice that aligns with the brand’s focus on stability, current delivery, and predictable performance under load. The idea is simple: give the amplifier plenty of clean power, and it will sound effortless rather than strained.
The OLED display and remote-controlled preamp section provide clear feedback and intuitive operation, while the internal signal path is optimized for low noise, wide dynamic range, and high headroom.
The technology inside the ENSO draws directly from the company’s U500DC and SP500 power amplifiers—units that already earned a strong reputation for their authority and clarity.
Where many integrated amplifiers treat the preamp section as a secondary concern, Ultrafide has clearly taken it seriously. The ENSO includes a full-featured preamplifier stage with:
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OLED display
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Full remote control
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±8 dB bass and treble controls
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Stereo Class AB headphone amplifier
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Adjustable MM phono stage
Comprehensive connectivity includes line-level inputs, adjustable MM phono stage, headphone output, and a send/return pre-out and power-in loop for external processing, multi-amping, or fully active speaker systems.
The tone control circuit isn’t a generic add-on either. It was designed by Alex Cooper, a respected name in pro-audio EQ design and the engineer behind the Ultrafide lineup. That heritage suggests the tone controls are meant to be musically useful, not just a nostalgic checkbox.
One of the most interesting aspects of the ENSO is its send/return pre-out and power-in loop. This feature turns the amplifier into something far more flexible than a typical integrated.
You can:
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Use it as a classic integrated amp with passive speakers
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Insert external DSP, EQ, or crossovers
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Add extra power amps for multi-amping
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Build a fully active speaker system around it
It’s a very pro-audio concept—design the amplifier as a modular hub rather than a closed box. For enthusiasts who like to experiment with system architecture, this kind of flexibility is a big deal.
With 2 × 250 watts into 4 ohms, the ENSO offers strong current delivery and controlled low-frequency performance, designed to handle demanding loudspeakers while maintaining clarity, dynamics, and stereo imaging.
Minimalist form, serious engineering
Visually, the ENSO follows a clean, understated design. There are no oversized heatsinks, glowing tubes, or retro-styled meters. Instead, you get a minimalist chassis with a standard 17-inch (42 cm) width that fits neatly into conventional hi-fi racks.
It looks purposeful rather than flashy—very much in line with its pro-audio roots.
Ultrafide is the hi-fi division of MC² Audio and XTA Electronics, companies with decades of experience in professional sound reinforcement and signal processing. That heritage shapes the ENSO’s entire philosophy.
The integrated amplifier combines a high-current UltraSigma power stage with a full preamplifier section, adjustable MM phono input, Class AB headphone amplifier, and ±8 dB tone controls designed for precise system tuning.
Instead of designing a product around marketing trends or feature lists, Ultrafide approached the ENSO as an engineering exercise: take proven pro-audio technology, refine it for domestic listening, and remove the compromises that usually come with mass-market hi-fi.
The result is an integrated amplifier that promises:
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High headroom
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Strong low-frequency control
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Clean, stable power delivery
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System-building flexibility
Price and availability
The Ultrafide ENSO INT-125 is available from February 2026 with a retail price of £3,500 (including VAT). It will be demonstrated publicly for the first time at the Bristol Hi-Fi Show 2026.
The ENSO INT-125 feels less like a traditional hi-fi integrated and more like a piece of professional amplification reimagined for home listening. It’s powerful, flexible, and engineered with a clear “music first” mindset.
For listeners who want serious drive, modular system options, and a touch of pro-audio credibility in their rack, the ENSO looks like a very compelling new arrival.
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