I have now used this item for several months and it has worked perfectly and provided excellent sound reinforcement. As indicated elsewhere, the lack of a carrying handle makes moving it a major, two-armed balancing act. I have just voided my warranty by fitting a £3 equipment carrying handle and that problem is now solved. I shouldn't have to risk my warranty to achieve that!
In all other respects, it is an excellent piece of equipment, very easy to set up and use. Oh, and please can we have a matching passive extension unit?