Car stereo reviews: the best double-DIN head units 2021

Which sounds like the best option? 
We might upgrade our phone every couple of years to keep up with the latest technology, but most of us won’t renew our cars quite as often. This can leave us looking enviously at the newest models with their DAB radios, voice activation and perfect integration with smartphones.
But there is an alternative to trading in your car or crudely hanging your phone in a mount on the dashboard. Upgrading your in-car entertainment isn’t as difficult as