Pure Evoke S1 Speaker

Superb sound, easy connection, no external power needed

Good be a little more bass response . Some evoke flow radios will emit a high pitched digital 'chatter' when this speaker is plugged in making it unusable, BUT a call to Pure soon got me a free replacement which worked perfectly well with this...

Improves the Evoke Flow considerably.

In absolute terms it's not great value as it's not cheap, but if you have an Evoke Flow, then you need one of these.