Willem Bertino

There are many audio products on the market that promise to improve the quality of your sound. But great sound comes from more than just a great set of quality headphones; using an external Digital-to-Analog Converter (DAC) is an excellent way to enhance your sound and have your headphones working to their full capacity.

Take note: For the sake of brevity, we are assuming that the external DAC comes bundled with an amplifier (amp).

A DAC system is fairly self-explanatory. Songs which are stored in digital form, like MP3s and CDs, are represented in digital signals. This handy device takes the digital audio data and translates it into an analog audio signal. That processed signal is then sent to a headphone amp, which elevates the signal to an audible level on a headphone.

As such, a headphone DAC offers a powerful, but dedicated, component to the sound equation.

You may be surprised to find that many electronic devices already include a built-in DAC and amp. They can exist in either in the form of the speaker output or headphone audio port. Without them, your music would remain a series of 0s and 1s never to be heard by the human ear.

But if that is the case, why do you need an external headphone DAC for?

Simply put, the quality of the music you hear is determined by the precision of your DAC converter. The aim of any sound system is to preserve and recreate, as much as possible, the true sound of the studio recording to your ear.

Whether you should invest in an external DAC depends firstly on the specifics of your existing gears. For the average listener, the quality of an internal DAC is already acceptable.

For audiophiles, however, the DAC circuits used in many devices just don’t do the original recording justice, and they desire an upgraded, “cleaner” listening experience.Hence, they upgrade to an external DAC to bypass the inferior built-in audio circuitry.

An external DAC bypasses the internal DAC and can fix many problems associated with inferior devices.

These issues include:

Jitter occurs due to digital timing errors. If the clock in your music device and the internal DAC aren’t in sync, then the audio quality may sound slightly off. A premium DAC achieves a more precise timing, which is vital for digital music streaming.

Background hiss can be extremely frustrating during the quieter segments of your music. Using an upgraded DAC can clean up the signal quickly and easily, eliminating the noise at its source.

While some DACs may not support all file data rates, an external DAC can. This allows more versatility, and so an external DAC may be the best choice in this situation.

Inferior converters can add unwanted noise during playback because of poorly designed setups. Upgrading to an external version is a welcome remedy, which can also eliminate any interference produced by your sound card.

Headphones with high impedance or resistance require a high voltage output from your device. Devices with poor amplifiers do not have enough power to produce high audio level, resulting in low volume. One method of increasing the overall volume of your music is by using an external DAC, as many are built with amplifiers.

Music aficionados seek dynamic sound quality and fidelity. A superior external DAC can enhance your tunes with improved clarity and marked detail, and generally, outperform inbuilt DACs in many areas.

I often find questions in forums like this:

There are various elements, other than the DAC and amp, which can influence playback quality:

To get the optimal effect from your DAC and audio system, you need to start out with good source material. The best results will always come from CD-quality sound and above. My suggestion would be to stick to “lossless” audio formats such as FLAC, WAV, ALAC or DSD formats.

On the other hand, we have the “lossy audio format” such as MP3 and MP4. In comparison to “lossless” audio, the compression process can add all kinds of distortion to your music. If you only listen to “lossy audio”, even if you upgrade to an expensive DAC, do not expect to get any extreme sound upgrade.

Bear in mind: Rubbish in, rubbish out.

The number of details that you can pick up from your music depends on your headphone. Even if the DAC can accurately recreate the recorded analog signals, the headphone have the final say in how the sound translates into your ear.

A headphone with low-end dynamic driver will not sound the same as a headphone with quality drivers.

An external DAC will also do little to affect the frequency response that you get out of the headphones. For example, a headphone with v-shaped sound signature have recessed mids and emphasis on the lows and treble. In this case, there is nothing an external DAC can do to affect that.

DACs come in many different sizes and offer a range of functionality. For example, some are ideal for headphones, while other types only work with stereo systems. Of course, DACs all come with different price tags, and therefore the one you settle on will depend ultimately upon your requirements and budget.

To wrap it up, let’s answer the over-arching question:

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