Design - Feather Weight - Dual Channel Flexibility -Ultra Portable Power -Connectivity With its switch mode power supply and Aluminum chassis, the MB 500 weighs in at only 3.75 lbs (1.7kg). Balanced DI with Pre/Post and Ground Lift switches to feed the house, Foot Switch Jack, Tuner output, FX Loop for connecting outboard accessories, Headphone Output for silent practice, Line Out plus “Chain Out” to drive GK’s MBP powered cabinets. Two twist lock speaker connectors ensure reliable and safe cabinet connections. Drops into your gig bag for effortless transport to travel dates, rehearsals and enough power for moderate size venues. Inherited from the 800RB, this unique design varies the EQ bandwidth to retain a musical response even at extreme settings. Switch mode power amp and supply deliver a crushing 500 Watts of cool running power