Ultimate Ears has been redefining its lineup of Bluetooth speakers lately, waterproofing them and fine-tuning their innards so they all have the same tech at their core. As part of this unification, the company's pushing a new over-the-air firmware update around 1PM ET that adds the Boom 2's tap control functionality to Megaboom speakers. That's not all: An app update for iOS and Android is also rolling out with a new feature called Block Party. It takes the multi-user playback feature (which, to be honest, I've rarely had much success with before) and gives it an easy-to-use visual interface. Up to three users (including the host), can connect to a UE Roll, Boom 2 or Megaboom speaker and jump in with their own tunes. To keep potential mayhem in check, the primary user can moderate that input by playing, pausing, skipping to the next track or removing a user entirely from the DJ roster. If a spot opens up, anyone with a Bluetooth connection can hop in and join the party, playing their own jams or letting the host skip through their playlist. It's yet another step forward for UE's speaker line, but there are a few inherent limitations to this new feature.