The Ultimate Ears speaker lineup is getting quite crowded, having now reached six products with the recent introduction of the $249.99 Everboom. This speaker is a smaller, more portable take on the Epicboom that I reviewed late last year. And its core appeal is the same as any other UE speaker: you’re getting a rugged, waterproof speaker that’s cut out for both indoor and poolside parties. You can link the Everboom up with other UE…