DIA-250S High End
Integrated Amplifier/DAC

The Gato Audio DIA-250S is the school example of how to merge excellent sound quality, perfect design, profound electrical circuits and aptX Bluetooth technology.

S is for "Super"

– this brand new amplifier may look like the standard DIA-250 amplifier we introduced three years ago, but in fact we put more than a years work into improve every part of the DIA-250s already fantastic award winning performance. We changed and improved the electrical circuits and layouts in more than twenty ways, the most significant being:

  • Optimized mains filter
  • Improved general and local power supplies
  • New input stage
  • Improved output stage
  • New analogue stages in the D/A converter
  • Improved digital signal routing
  • Updated firmware
  • Improved connectors
  • Incorporated aptX Bluetooth module

More details, better micro dynamics and more "air" around the performing musicians. Everything is served with naturalness and a musicality normally reserved big expensive class A/B amplifiers - the result is stunning!

Class-D with smooth
analogue music

The DIA-250S amplifier offers a state of the art Class-D output stage with dedicated and optimized switch mode power supplies. The multiple stage power amplifier is built around proven technology from International Rectifier, optimized with a precision high frequency oscillator and PWM modulator. A pair of precision switching MOS-FET transistors, with super low on-resistance ensures the high frequency switching is done perfectly and with as little loss as possible. The output filters are made from quality PP capacitors and low DCR coils, converting the high power PWM signals back into detailed and smooth analogue music.

More than just an Amp

The built-in D/A converter offers real high end performance, enabled by the use of a dedicated power supply, a balanced-drive Burr-Brown PCM1794 D/A converter, an optimized high bandwidth I/V converter, and an analogue stage with low-Q, low pass filters. All digital inputs are upsampled to 24bit/192kHz. This D/A converter will upgrade any digital source - such as wired or wireless streaming from your computer or CD drive - to a high end level of detail and musical performance.

Versatility and Connectivity

We had our eye on versatility and connectivity when designing this amplifier. The DIA-250S offers not only a wide range of digital and analogue inputs, but also line outputs, a trigger signal for external power amplifiers, and a configurable home theater input. The HT input can turn the amplifier into a fixed level power amplifier for use in a surround setup, without compromising the sonic performance.

Unlimited Digital Music Sources

This amplifier can be bend in more ways that you can imagine. With AptX Bluetooth, USB or Toslink input, you have direct access to all the music services the world has to offer.

Turn your DIA-250S into a High Performance Roon Ready Network Player

Adding a Network Player Module to your DIA-250S is a powerful way of transforming your amplifier into a High Performance Roon Ready network streamer. Read more about the NPM upgrade here.


  • 2x 250W@8ohm / 2x 500W@4ohm
  • Class D output stage
  • Built in 24bit/192kHz D/A converter with upsampling
  • Coax and asynchronous USB digital input up to 24bit/192kHz, optical up to 24bit/96kHz
  • aptX Bluetooth 4.0 receiver
  • Accepts digital streaming directly from Apple iPhone or iPad
  • Two unbalanced and one balanced inputs
  • Nonmagnetic enclosure
  • Direct function; enables use in home theater sytems
  • Designed, developed and build in Copenhagen, Denmark

    • Technical stuff

      • Output power 2x 250 W / 8 Ω - 2x 500 W / 4 Ω
        Frequency response 20 Hz-20 kHz - 0.5 dB, and 2 Hz-70 kHz - 3 dB
        Total Harmonic Distortion < 0,01% at rated power
        Signal to noise ratio > 110 dB
        Line out maximum level 13V balanced, 6,5V unbalanced
        Total Harmonic Distortion < 0,001% pre out
        Input impedance 20 kΩ RCA or 40 kΩ Balanced
        Line output impedance 75 Ω
        Voltage gain 26 dB (+10 db headroom)
        Recommended speaker load 4 -16 Ω


        Balanced analogue inputs 1 pair gold plated XLR Neutrik
        Unbalanced analogue inputs 2 pairs of gold plated RCA Stereo
        Digital inputs 1 pc USB type B, 1 pc Toslink, 1 pc RCA, 1 pc aptX Bluetooth
        Balanced analogue outputs 1 pair gold plated XLR Neutrik
        Unbalanced analogue outputs 1 pair of gold plated RCA Stereo
        Speaker output 2 pairs of gold plated safety banana
        Trigger, 12 V 1 pc mini jack

        Size & Power

        Power Requirements 115 VAC/230 VAC, 50 Hz/60 Hz, 1000W max
        Power consumption stdb/idle/max < 1W/23W/1000W
        Dimensions (WxHxD) 325 x 105 x 420 mm / 12.8 x 4.1 x 16.5"
        Weight 10 kg / 22 lb
    • Reviews

      • Gato Audio DIA-250S review

        StereoLife.pl, Poland
        June 2018

        Original language: Polish

        "Gato Audio offers a sound that you do not have to get used to.It is well balanced, natural and universal.It is in a perfect balance between transparency and musicality. With a deep bass, a transparent top, a close to perfect midrange. It's really hard to attach a single negative word to it."
        Gato Audio DIA-250S review

        Fidelity, Germany
        May 2018

        Original language: German

        "Can the eyes hear? You could almost think so. Because the DIA-250S in sweeping Danish design not only has power, but also visually sets a strong accent in an increasingly monotonous world..."
        Gato Audio DIA-250S review

        Hifi Maailma, Finland
        June 2017

        Original language: Finnish

        Gato Audio DIA-250S review

        The Ear, UK
        March 2017

        Original language: English

        Best buy Award!
        "...the Gato Audio DIA-250S is my new reference in its price range and a lot higher too."
        Gato Audio DIA-250S review

        Audio Video, Poland
        May 2016

        Original language: Polish
        Translated: English

        Five Stars and the Recommended Award!
        "This model from Danish company Gato Audio may seem too lifestyle to be audiophile at first look. However the DIA-250S integrated amp is a piece of fine engineering and really great sound."