I have had a GK RB400 for nearly 30 years. This mini sized GK is a great additon. It has a wide spectrum of sound textures in a very small package. It is perfect for jam sessions and gigs.The power rivals my old GK. It fits in my Bass Guitar bag and weights so little I hardly notice it. It seems like I have eliminated a significant item I have to carry around. The sound is excellent but my old GK provides a little more warm lows due to the contour control. I purchased a Neutrik to 1/4 inch adapter for the speaker out put for my older speaker cabinet (only a few d $). Another winner for GK.