A challenge as a technology journalist is making sure more complex material remains accessible to your audience without compromising accuracy. With a daily UK readership of 1.895 million the Metro newspaper’s audience is broader than most, so when writing here I’m at pains to check that I’m maintaining clarity without sacrificing substance.

An example: faced with an assignment on Digital-to-Analogue Converters for this week’s Connect section of the paper I pitched hard with my editor to include an introductory paragraph to give some background. The format doesn’t normally allow for this, and even though we knew we would lose word-count elsewhere in the piece she agreed. It was the right decision.

A bit more about DACs:

A DAC or Digital-to-Analogue Converter takes the 0s and 1s from your digital music source – a CD, mp3 or Spotify stream for example – and pumps out the analogue signal necessary for speakers, subwoofers and headphones to function*. You’ll find them in phones, PCs, TVs, DVDs, games consoles, even digital radios – anything that plays audio from a digital source.

While this sounds like it should be a consistent digital activity there is variation in the specification of DACs which can result in audio quality differences. Bluntly, the DACs integrated into our devices may not be making the most of the audio source, particular if from high-resolution or lossless audio formats.

That’s where an external DAC comes into play, squeezing as much detail as possible from good quality digital audio files. They can also add some extra power to the output too – I for one find the volume on my Apple iPhone 6 Plus a little too soft when on the train, tube or in other noisy environments. There is additional significance here for iPhone owners given that Apple has pulled the plug on the ubiquitous 3.5 mm headphone jack in its newer phones – something these jack-equipped headphone amps can help to work around.

Anyway, that’s the background to an On Test piece in which I test drive three class-leading high-end, mid-price and great value DAC options.

DACs On Test in The Metro

I did try to name the feature ‘What’s Up DAC?’ but my editor overruled me. A shame, but once again it was probably the right decision : )

* I was curious to discover whether purely digitally-driven speakers exist: it turns out they do in theory but are impractical for mass adoption – there are precious few resources online but here’s what Wikipedia has to say about them.