The Sennheiser Melody is bigger, louder and has more stamina than most Bluetooth speakers. Slip your hands around its convenient carrying handle and the 9-lb. sound cannon starts to feel more like a modern-day boombox. The 360-degree sound system, arrayed with four bass radiators and four full-range speakers, will have party feet tapping in no time. The device also boasts APT-X Bluetooth support for high-quality audio streaming. And with 20 hours of battery life, they’ll enjoy at least a dozen albums’ worth of playback before the Melody misses a note.