There are many options when it comes to generating sound in the garden. For many, something like the Sonos Move will do the trick (good wifi is critical for Sonos), or the Bowers & Wilkins Formation Flex if you want something that sounds a bit better. A portable speaker that has Bluetooth connectivity to allow for simple playback of your music. The problem with products such as these is one of scale. They aren’t really designed to fill a garden with sound.
On-wall speakers like the ones shown above by Bowers & Wilkins are designed to not only produce a weighty enough sound to work outside but are also weatherproof. But whilst these are not particularly “ugly” speakers, they can be quite obtrusive attached to a wall, and of course, the biggest issue is that you will need to have the volume up to fill a garden or outdoor entertaining area, meaning that if you are the unfortunate soul stuck talking to Great Aunt Fanny and you are close the wall with the speakers on it then you won’t hear a thing over the lyrical mastery of DJ Jazzy Jeff and the Fresh Prince.
A far more social solution is to have discreet satellite speakers dotted around the garden, in planters and among shrubbery that can surround you with polite sound when talking is the order of the day, then, as darkness draws on you can ramp the volume up and party through the night. These Sonance Landscape Series speakers are a great addition to any garden.