At Sony, the relationship is clear. The Ult Field 5 is an Ult Field 3 - bigger and better. The sound is more balanced and powerful, the battery lasts even longer and even the Ult modes are more impressive. At the same time, it remains true to the understated but smart design of the Ult Field 3 and should feel at home in both the teenager's room and the office...

The Sony is the latest, the largest and by far the loudest speaker tested. Just a third of its maximum volume is enough to fill a kitchen party with so much sound that you can only have a gentle roar of conversation. Sony has explicitly designed this model as a party speaker that you can use on the go or bring to a party...