Vifa, one of our favorite Danish audio brands, has come out with another beautifully made portable wireless speaker worthy of consideration. This time Vifa is using less of a super chic design like it has for the Helsinki speaker we've taken a look at some time ago, and instead has taken more of a utilitarian approach by using its modern boombox-inspired Copenhagen model and essentially splitting it in half. The result is what Vifa is calling the Oslo speaker, a slightly larger portable Bluetooth speaker than Vifa's Helsinki featuring larger Force Balanced woofers and passive radiators that should produce an even bigger punch from a smallish-sized speaker. So how does this speaker perform in practise? Let's find out!