This series is a further example of how Markbass is always one step ahead in innovating using state-of-the-art technologies. 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. The MB58R 151 P features 1x15" Markbass classic ceramic speaker and a new piezo tweeter. The P series is created for those who like classic speakers but don’t want to carry heavy stuff, thanks to the revolutionary material and technology used for the cabinet enclosure, the MB58R 151 P weighs only 14.8 kg!