We were a little sceptical about these boxes, how could you get that much great sound out of a box that cost a quarter of the price of other manufactures, well we were impressed, we first used the boxes as a stack on top of the Achat 118 subs for a small festival, we didn;t need it to be loud but FOH was 25m away and we could happily maintained 98-100db , we threw Jazz, Funk, Rock and the od dirty DJ set at the system over the weekend, and it kept going with no problem, we will defiantly be investing in a second pair of stacks before the year is out. the only quality issue is the paint, it comes off with the smallest of bumps