If you know someone who always has the perfect playlist queued up, the Ultimate Ears Wonderboom 4 makes for a solid gift. It’s easy to bring to the beach or take with you on a short weekend jaunt, and it produces surprisingly robust sound despite its pint-sized stature. Thankfully, it’s also once again on sale at Amazon and Best Buy for $66.49 (about $32 off) as part of Prime Big Deal Days , dropping it to its second-best price of the year. Generally speaking, we’re big fans of UE’s wireless