Braven's new BRV-X Bluetooth Wireless Speaker ($230) is the spiritual successor to the audio maker's BRV-1 unit. Sporting the same ruggedized aesthetics, IPX5 weatherproofing, and a rear screw-off cap, it's bolstered by much-improved audio components inside a larger package. Underneath that lid, you'll find standard power-in and aux ports, plus a 1-Amp USB output for the 5200mAh battery, a remaining power indicator button with corresponding lights,…