Naim Nait 5si Integrated Amplifier
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Naim Nait 5si Integrated Amplifier


The Naim NAIT 5si is a traditional line-level class AB integrated amp with a discrete headphone amplifier. It has no phono stage, no DAC, USB and no Bluetooth capability. It just sounds refined, authoritative and musical.

The NAIT 5si delivers sixty watts into real loudspeaker loads, each watt with the legendary Naim rhythmic drive, dynamism and musical integrity. Entry-level it may be,but innovations such as its new ceramic heatsink help make the music it plays yet more detailed, engaging and recognizably Naim.


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Product Description

The Naim NAIT 5si is Naim’s 60W per channel introduction to high-performance integrated amplification.

This Naim Audio amplifier claims a common heritage with the classic NAIT model, the NAIT 5si will get straight to the heart of your music. It engages even the most complex rhythms and demanding dynamics with all the grip and authority you would expect from Naim. Its clever AV bypass mode, which facilitates an easy co-existence of otherwise distinct AV and hi-fi systems, simply adds to its appeal.


  • 60W per channel power output
  • Four inputs with support for both DIN and RCA connections
  • 1/4” (6.35mm) headphone output
  • AV bypass mode for simple connection to an existing AV system

Technology & Craft

Decades have passed, but the role of the NAIT 5si is fundamentally the same as its original forebear. So the engineering challenge – to maximise performance whilst maintaining engineering efficiency, quality and reliability – hasn’t changed. Amplifier technology has moved on considerably however, and while the NAIT 5si occupies the same position in the Naim Audio range as the original NAIT, its performance might be from a different world.

The NAIT 5si provides four analogue inputs and a 60 Watt per channel power amplifier. It borrows numerous technologies from across the spectrum of Naim Audio products; all dedicated towards maximising its ability to communicate the fundamentals of music. And communicate it does. The NAIT 5si brings clarity, engaging dynamics and, most of all, infectious enthusiasm to every music source and genre.


We like the Naim’s smart-yet-simple look; it has a great build (which happily extends to the remote control, too). There’s no doubting the Nait 5si’s talents; it will shine at the core of any system made up of talented-sounding, like-minded electronics.

We knew it was a class act when we first heard it. It’s been a year since then, yet this hasn’t changed our minds. The competition is tough, but this is a five star performer.

It is dynamically and rhythmically strong, stacks of detail, produces powerful but refined sound, energetic, huge scale and authority.

What HiFi Magazine (7th October 2013)

The Naim NAIT 5si is a world-class integrated amplifier that delivers more audio precision and musical enjoyment than any self-respecting anti-imperialist should ever need.

Stereophile (Sep 26, 2014)

The strength of the NAIT amplifier was always its ability to accurately convey music’s primary building blocks — pace, rhythm, timing and pitch — perhaps to the exclusion of some hi-fi qualities. A true all-rounder. (March 04, 2008)


Very few high-end components offer such value, reliability, sound quality, ability for upgrading, ease of use, and fun for that amount of money. Very highly recommended. (January 2002)

It looks very unassuming almost bordering on boring and will no doubt be frowned upon, but for what it does sonically, these nit picks are forgiven and is embraced whole heartedly by its owners. This amplifier will certainly be part of the test rig at HifiHunt as a benchmark, which says a lot about the 5Si. (27th December, 2015)