Grado’s range-topping Statement headphones head the class in sound quality, but they need pampering.
These high-end Technics in-ears are smooth and capable performers, but they need a top quality source.
Even decent noise-cancelling can't save the Amazon Echo Buds – they’re flawed in a number of areas, not least sound quality.
UPDATED The most technically impressive true wireless headphones get more technically impressive, but do they sound better?
Updated These AKGs are quite something – Bluetooth headphones that sound just as good as their wired counterparts...
Updated All the features and functions you could hope for, but the audio isn’t good enough to keep us listening.