The Gallien-Krueger MB500 bass head amplifier is perfect for any bass player on the go. It delivers 500 watts of power in a less-than-1U amp that weighs under 2 kg - easily small enough to fit in your gig bag. In addition to its generous tone-shaping capabilities, the preamp section has a footswitchable boost channel with independent volume control to dial in just the right amount of grind and level boost when needed.
The MB500 is stage- and studio-ready with an XLR direct out with pre-/post-EQ selector and ground lift. Also offers a tuner out with mute, FX loop, headphone/line out, and dual Speakon outputs.
Feather Weight: With its switch mode power supply and Aluminum chassis, the MB 500 weighs in at only 3.75 lbs (1.7kg).
Ultra Portable Power: Drops into your gig bag for effortless transport to travel dates, rehearsals and enough power for moderate size venues..
Dual Channel Flexibility: Foot switchable channel switching for on the fly volume boost or additional grind.
Connectivity: 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.
Designed and Manufactured in USA
Variable Q Tube Equalizer: Inherited from the 800RB, this unique tube design varies the EQ bandwidth to retain a musical response even at extreme settings.
High Tech Power: Switch mode power amp and supply deliver a crushing 500 Watts of cool running power.
Intelligent Cooling: Temperature controlled fans keep the amplifier cool delivering only the required amount of air, reducing noise and dust intake.
Protection: Thoughtful handle design protects the front panel controls. Internal circuitry indicates problems on the power switch ring. Blue is good!
Type: Solid State
Number of Channels: 1
Total Power: 500W @ 4 ohms, 350W @ 8 ohms
Effects: Yes, Effects loop and tuner output with mute
EQ: 4-band active EQ with contour switch
Inputs: 1 x Instrument
Outputs: 2 x speakON, 1 x XLR output (pre/post EQ and ground-lift switch), 1 x Tuner, 1 x Headphone/Line (1/4")