In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. It wasn't easy to make a great bass amplifier even better, but Bob Gallien has managed to do just that with the introduction of the MicroBass Series III. A longtime favorite for session bassists such as Leland Sklar, Charlie Haden, Ron Carter and Jimmy Earl, GK's MicroBass remains the industry standard for high quality compact bass amplification in and out of the studio.