Ultimate Ears (now owned by Logitech) has found great success in the marketplace with its "Boom" series of Bluetooth speakers, a modest tube about the size of your typical energy-drink can, that puts out sufficient volume to provide a wireless soundtrack of music for an intimate gathering, or double as an on-the-fly conference call speaker. Sometimes, however, you need to go large, and for that the company offers the Megaboom, a bigger speaker that offers even more volume for when you need more people to hear the music. How big is too big for a speaker like this? How loud is too loud? We had a