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 Extraudio X251 Integrated Amplifier 

A refined and efficient integrated amp, with a real sound ...


The X251 is the result of more than a decade of R&D and innovation in audio product development by Extraudio engineers and technicians.


The new Extraudio X251 solid-state, modern, analogue integrated amplifier has been developed using our energy-efficient philosophy in the pursuit of the highest standards of honest sound reproduction



The X251 is designed from the Extraudio XP3 preamplifier, which includes the latest Extraudio improvements and innovations.

But not only is the preamplification of the integrated amplifier based on the Extraudio XP3, but this X251 amplifier physically includes the entire section of the XP3 preamplifier. We know that the pitch or character of a high-end audio product is 90% created in its preamp section. At Extraudio, after a rigorous study based on tests and measurements, we have come to the conclusion that creating an integrated amplifier with a small preamp section is not the right thing to do, as it prevents us from experiencing in its true magnitude all the nuances and sensations that musicians want to transmit in their works.

That's why we included the entire XP3 preamp inside the Extraudio X251, which is built with no compromises or limitations, delivering a sound that is totally real and absolute.



To this preamp section we added our new high-power EPAM amplifier module, with technology unique to Extraudio, in a philosophy that is premised on high energy efficiency. The result is a natural, fast and powerful sound.

The EPAM amplifier module provides 26 Amps per channel and up to 280W for its two channels at 4 Ohms, with a damping factor of more than 700, so it can control any type of loudspeaker.



Power supplies are the other key pillar of Extraudio sound. Their ultra-low noise cleanliness and precise audio frequency calculation offer added value. Both factors are responsible for providing the power and life to our audio systems.

The high energy is converted into ultra-low frequencies, and the ultra-low noise level into an out-of-the-ordinary transmission of vocals with very well-defined high frequencies. All this allows us to discover the most exquisite micro details of recordings, which other audio products are not able to express.




The X251 includes our exclusive Extraudio remote control.

This remote control has been conceived with an innovative approach with the user’s convenience in mind. Extraudio sought to offer a device in which battery life and operating distance were its main features. Both objectives have been largely achieved.

The remote control has no removable batteries, but includes an internal battery that only needs to be recharged with a standard USB charger.

The transmission range is 20 to 80 metres, depending on the country in which it is used and the electromagnetic or RF interference present.

The design has a minimalist line, the hallmark of Extraudio’s devices. There are only four buttons: on/off, volume up/down and mute. The concept behind this remote control is unusual, pursuing a more efficient and ergonomic creation.



When it comes to the design and aesthetics of the X251 integrated amplifier's exterior, we are proud to have retained the Extraudio style, minimalist and neutral. Timeless shapes that allow Extraudio equipment to blend seamlessly into any home, be it modern or classic in style.

Likewise, in the chassis we have applied our construction experience based on the use of solid 6000 aeronautical aluminium panels of the highest hardness and quality. This construction provides strength and durability to the product, minimising vibration.

The front aesthetics of the X251 amplifier are simple. On the front panel, apart from the power button, there are two rotary knobs: one for volume control and one for input selection. Linked to the latter are the LEDs with their respective legends, which, when illuminated, indicate the corresponding active input. Everything else is controlled by our software inside the preamplifier.



At Extraudio we base the design of our equipment on the philosophy of Mies Van Der Rohe, who applied the concept of "less is more" to his works.

We eliminate superfluous elements in all phases of the construction process of our products in order to enhance the essential ones.

With this premise, it is easy to understand the sensations that audiophile enthusiasts experience when listening to the X251 integrated amplifier, which can be summed up as "an absolute sound, a more real sound".

Extraudio X251 Integrated Amplifier

  • Specifications: 2-Channels, Dual Mono and quad power supply.

    Frequency Response: 20Hz to 50Khz +0db Flat response

    Signal To Noise-Ratio: > 119 dB  (20 Hz - 20 kHz, 8 Ω load)

    Dynamic range: > 119dB

    THD+N (1kHz @ 1W): 0.003 %

    Peak output current: 25 Amp x2

    Voltage Gain: 26dB

    Gain: (Balanced – Unbalanced) 12db / 6db

    Input Impedance: (Balanced / Unbalanced)  120K / 60K Ohms

    Output Power: 280W X2 4Ω / 140W X2 8Ω,
    Extraudio EPAM amplification module

    Damping factor: > 700, total channel (8 Ω load, 1 kHz and below)

    Power requirements: 115V or 230VAC 50/60Hz,
    20W to 300W – 0.5W standby

    Ecodesign (ErP) & Energy Star compliant standby consumption of < 0.5W

    Safety approved and verified for EMC compliance

    44 x 12 x 40 cm  (Product W x H x D)
    66 x 66 x 37 cm (Shipping W x H x D)

    Weight:  (18 kg)  /  (22 kg) Shipping


    Analog inputs:
    4 pair unbalanced RCA +0db
    1 Pair Balanced XLR -6db
    1 Processor AV +0db
    (RCA and XLR connectors)

    Speakers outputs:  2 Pair Speakers,
    WBT Germany Speakers Connectors

    These pre-specifications are subject be changed without notice.

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