Front speakers X 3F and subwoofer X3S setup together through isolated spikes, this can reduce the interferences from subwoofer to satellite speakers. X 3F using two 6.5” woofers, two 3” midranges and one 28mm soft dome tweeter to make D'Appolito configuration. Powered subwoofer X3S using 15” driver unit, and having in-built 260W power amplifier. The whole system can easily get very dynamic high SPL sound level output.