Ultrafide Audio launches ENSO – the “music first” integrated amplifier
We are taking our pro-sound-to-home revolution further with the launch of our debut integrated amplifier, the ENSO (INT-125).
Flexible, scalable and musical, the ENSO is designed to be the centre of your sound. Its 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 our 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.
The ENSO (INT-125) launches today (11 February 2026) and will be unveiled publicly for the first time at the Bristol Hi-Fi Show later this month.
Designed to give listeners complete control
Our audio-obsessed team firmly believes the ENSO INT-125 lets you focus on and enjoy your music, your way.
Retailing at £3,500 (inc. VAT), the ENSO features a linear toroidal power supply and draws on technology previously showcased in our widely acclaimed U500DC and SP500 power amplifiers. The result is superior audio performance with a clear focus on sonic purity, headroom and musicality.
The preamplifier section includes an OLED screen with remote control – as found on our U4PRE – alongside ±8dB bass and treble controls designed by Pro Audio industry EQ legend Alex Cooper, the mastermind behind all Ultrafide product development.
One of the ENSO’s standout features is its send/return pre-out & 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 Ultrafide’s customary elegant, minimalist chassis, the ENSO is a standard 17” (42 cm) width, making it easy to integrate into any Hi-Fi setup.
Mark Bailey, product specialist at Ultrafide Audio and MC², said:
“The ENSO (INT-125) is a huge moment for the Ultrafide brand. 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. Make sure you come to Room 314 and hear it for yourself – we’ll be taking music requests so you can test it with your favourite tracks.