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This model has been designed with our unique ULTRA LIGHT unified design process, yielding a 600 watt professional high powered tour-class bass guitar amplifier, weighing only 3.75 lbs! This 2nd generation SHUTTLE® amplifier now incorporates our unique 3-Dimensional Power Management circuitry along with other enhancements like increased tube gain and high efficiency thermal management. Our proprietary 3DPM™ technology insures greater and more solid sounding output while retaining the feel and pla