Wi-Fi speakers are having a moment right now. A little over a month ago, there was Sonos’ return to the hardware game with the Play and Era 100 SL speakers , both of which are proper and compelling installments to the Wi-Fi speaker field. Denon also got in on the mix with a new trio of sleek-looking Wi-Fi speakers that, on paper, give Sonos a run for its money. And now—as if Sonos didn’t have enough reasons to worry—it’s Bose’s turn to take a shot at the Wi-Fi speaker crown with its $299 Lifestyle Ultra Speaker , and boy does it take a good one. Bose Lifestyle Ultra Speaker The Lifestyle Ultra Speaker is an excellent-sounding speaker that gives Sonos a run for its money.…