New audio input capabilities are nothing new for JVC, but soon you'll be able to show off your guitar chops alongside whatever bands you choose to idolize -- so long as you're kosher with rocking a boombox atop your left shoulder, of course. The company has announced that the 2011 offering from its Kaboom line will showcase a guitar / microphone input (1/4-inch) with mixing capabilities to allow for gigs to be played from anywhere you darn well please. The RV-NB70 will have all the key ingredients of previ