Once again Marco De Virgiliis with his pioneering soul has managed to create this new series of products which has really nailed the tone and power versus portability issue. This is a further example of how Markbass is always one step ahead in innovating using state-of-the-art technologies. The MB58R 151 ENERGY features 1x15" Markbass Neodymium custom speaker and 1" driver with horn. With its 400 W (RMS) of power handling and only 15.2 kg weight, it can be used as a standalone giving a deep, classic sound that suits many musical styles, or in combination with a MB58R 102 ENERGY or a MB58R 104 ENERGY for a very versatile and powerful stack!