I have the sub as a supplement for my Play: bought 5 pairs. The sub is high-quality and makes a heavy (16 kg) and absolutely strong impression. The decor is typical Sonos super easy: plug power cable, add a new device to the Sonos application, short test tones to finish. One can the sub at any time enable / disable the fortuitous effect by head pressure. Meinklang impression: As expected expanded the Sub the Play: 5 down. Low tones are absolutely clear and dry play. But noteworthy is the positive change in the Play: 5 which arise from the sub reprogramming the digital play: 5 crossovers. The Play: 5 now have an even better resolution detailiertern and sound in the heights. In my opinion, the sub is an absolute buy recommendation for each Sonos Play owner and it is worth every euro! Due to the high-quality design and much better music enjoyment even the WAF factor is very high.