The 5150 series is a line of vacuum tube based guitar amplifier made by Peavey Electronics from 1992 on. The amplifier was initially created as a signature model for Eddie Van Halen. After Van Halen and Peavey parted ways in 2004, the name was changed to Peavey 6505.
This is a fairly old line of guitar amplifiers so you might want to look at more new models. These newer products often use the most modern cutting edge technology in the filed of music. Once you have decided on a guitar amplifier you should also look at the best guitar cables on the market right now so you have the best connections possible!