The Gallien Krueger MB-500 is a slightly refined version of the MB2-500 Ultra Light Bass amplifier. It is fully equipped with professional features like master and gain, padded input, eq contour, 4-band active EQ, foot switchable boost, tuning mute, effects loop, isolated DI, Speakon combo outputs, headphone/line out, and 500 watts of power into 4 ohm loads. The MB-500 is just 4 lbs make it one of the lightest amps on the market. It easily pushes two 4 x 10 GK cabinets in testing so the power rating of 500 watts is for real. GK has redone the EQ and made a few minor tweaks on the MB-500.

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