These are fine margins, but for £400 we are allowed to be greedy. Acoustic Research has designed a quality product, but it isn't quite capable of blowing its competitors out of the water. See all our ...

Alongside the DAC and amp components, there's a middling quad-core Qualcomm Snapdragon 400 processor taking care of the digital duties, making sure the Android 4.3-based OS runs smoothly.

Due on sale in the next couple of months, details were a little thin on the ground but Acoustic Research claims the M20 will deliver "10 to 20 times the power output" of hi-res players from the likes ...