Ultrafide Audio has launched its debut integrated amplifier, the ENSO (INT-125). Flexible, scalable and musical, the ENSO’s name is inspired by the Japanese enso circle, symbolising completeness, unity and balance – reflected in both its sonic character and minimalist aesthetic.
The ENSO delivers 125 watts per channel into 8 ohms, or 2 × 250 watts into 4 ohms, based on Ultrafide’s trademark UltraSigma output topology. Features include pre-amplifier controls, tone adjustments, an OLED display, a stereo Class AB headphone amplifier, high quality adjustable MM phono stage and full remote control functionality.
Retailing at £3,500 (inc. VAT), the ENSO features a linear toroidal power supply and draws on technology previously showcased in Ultrafide’s U500DC and SP500 power amplifiers. The result is a clear focus on sonic purity, headroom and musicality.
The preamplifier section includes an OLED screen with remote control – as found on Ultrafide’s U4PRE – alongside ±8dB bass and treble controls designed by pro audio industry EQ legend Alex Cooper, the man behind all Ultrafide product development.
One of the ENSO’s standout features is its send/return pre-out and power-in, making the amplifier highly scalable. Users can operate the unit as standard, with passively driven loudspeakers or switch to a multi-amp / fully active system with external equalisation if desired, offering complete flexibility to enjoy music their way.
Housed in a minimalist chassis, the ENSO is a standard 17in (42 cm) width, making it easy to integrate into any Hi-Fi setup.
“The ENSO (INT-125) is a huge moment for the Ultrafide brand,” says Mark Bailey, Product Specialist at Ultrafide Audio and MC2. “It’s a flexible and powerful integrated amplifier that lets you focus on the music. Having been asked for this by many customers since our inception, we are pleased to offer a competitive price point – driven by our mission to make exceptional audio accessible.
“The ENSO INT-125 is also all about giving listeners flexibility and control, whether they’re running loudspeakers passively, or using external equalisation – ENSO gives the ability to do things your way. Plus, the range will be expanding with complimentary products, so watch this space! ENSO makes use of the best technology from our U500DC and SP500 power amplifiers, as well as our U4PRE preamplifier – offering a single, complete and unified solution for the home, with everything connecting harmoniously as one. We can’t wait to formally unveil the INT-125 at this year’s Bristol Hi-Fi Show. We’ll be taking music requests so you can test it with your favourite tracks.”
The ENSO’s unveiling follows a strong 2025 for Ultrafide Audio, including the launch of the DIAS high-power amplifier and the more accessible SP500, leading to exports to over 20 countries from the company’s UK base, where all products are designed and manufactured.
Ultrafide will be exhibiting in Room 314 at the 2026 Bristol Hi-Fi Show (20–22 February), where the ENSO will be showcased alongside Kudos Titan 505 loudspeakers.