What is a headphone amplifier?

Simply put, every device that allows you to plug in headphones has an amp built in. The amp takes the audio signal and boosts it, allowing us to hear sound through the headphones. Amps don’t only boost volume; they can add and improve qualities like soundstage and separation. Adding an amp to a setup can also bring extra warmth or clarity. This all depends on the quality of the amp and how it has been designed.

The reality is that most people won’t need an external headphone amp. That’s not to say that they wouldn’t benefit from one, though. Smartphones are now a very common music source, and with the technology getting better and better, they do a decent job of delivering good quality sound to most portable headphones and earphones.

There are plenty of headphones designed to be used with mobile phones and other low powered portable devices. These headphones generally have a low impedance of up to 32ohm, and high sensitivity of around 100db, so they are very easy to drive and are more likely to go louder. Remember though: not only do amps add extra power but they can also improve the quality of the sound. So, once you start looking at higher quality headphones, improving your amp will start to make more sense as you will want to get the most out of them. No matter how good your headphones are, the sound quality will be limited by how good the amp is.

Choosing a headphone amp

If you’ve decided to go for a headphone amp, you now need to decide which one to go for. There are many to choose from, and they go for anything between £20 to £2000 and more. Amps can be split into two main groups: portable and desktop.

If you want to add some power to your phone or laptop, then you will want to look for a portable amp. These amps can be charged, and will run off batteries, making them ideal for using on the move. They are also small in size, and there are some out there (like the iFi Audio xCAN) which can connect to the source wirelessly using Bluetooth.

 If you only use your headphones at home, or intend to use headphones that are particularly hard to drive, then you will probably want to go for a desktop amp as they are generally more powerful. Not only are they more powerful, they also tend to have a larger amount of inputs and outputs, making them very versatile. They will need to be plugged it at all times, so will need a power socket to work.

As amps can bring their own character to the overall sound quality, it’s worth making sure you choose wisely and pick an amp that will compliment your headphones. For example, if your headphones have a warm or bassy sound then it’s a good idea to go for a neutral or bright sounding amp. This also works the other way around; a warm sounding amp will complement bright headphones and help to balance the sound out.

Get in touch!

If you have any questions about choosing the right amplifier then please feel free to comment below! We’ll be happy to offer advice on this.

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Aesthetics and Build Quality:

The xCAN is built much the same as the xDSD, with a metal housing that is a bit of a fingerprint magnet and a plastic rear cap where the Bluetooth circuitry is located. The xCAN looks superb in person with a great size and shape.

The build quality is superb and the volume control does not stick out, meaning it is well protected and all the sockets are tight. Everything just feels very solid.

Features:

Unlike the xDSD, the xCAN only have analogue inputs along with Bluetooth capability. You get a regular 3.5mm line-input, along with a 2.5mm TRRS balanced line-input. Outputs are the same, one 3.5mm and one 2.5mm TRRS balanced.

The xCAN has the XBass II and 3D+ adjustments. The XBass II is a completely analogue bass correction curve and can be switched to boost low frequencies or to correct the presence region, or both. The 3D+ is also an analogue circuit that aims to correct the holographic soundstage, making headphones sounds less like the music is coming from inside your head.

The volume knob changes colour depending on the volume, starting at blue for low volume going up to red at full output. The xCAN delivers more power from its balanced output as you would expect, so it is recommended to use balanced if you can.

Sound:

Well, as the xCAN is mainly an amplifier, the quality of sound will largely depend on what you are feeding it. But feed it with a high-quality source and it will do its job of amplifying the signal without adding too much flavour. The xCAN is neutral and detailed. It may be a tiny bit on the smoother side so as to prevent it from sounding overly analytical, but it is not coloured to my ears.

When using it with Bluetooth you are relying on both devices; when using an AptX-enabled device, you get excellent audio quality. I really don’t know how iFi do it, but you really do not lose much in terms of sound quality when using this with an AptX device.

The xCANs dual mono amplification stage really is impressive, hiss free with sensitive IEM’s yet at a push it can power the Beyerdynamic T1 2^nd Gen with good results (Volume on red). Not that anyone would buy this solely for use with the T1 I don’t think, but it is still a very impressive feat from this tiny amp.

The XBass is a really handy boost for when out and about in noisy environments or just for slightly brighter sounding headphones. The 3D+ works wonders for more closed in sounding headphones giving you a more realistic soundstage. The ability to choose between bass and presence on the XBass setting is actually really handy and allows you a little finer tuning than a standard bass boost.

Conclusion:

The xCAN has all you need from a portable amp, perfect size, good battery life and easy to use. Add to that excellent Bluetooth implementation, balanced circuitry and overall sound quality is the only portable amp you will ever need. Another superb product from iFi that has our seal of approval.

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