very cool for that price you can not go wrong I do not know there value unless the price is a type-o I would jump on them could be a steal if the person dose not know what they have some one that know more should be along soon
however I have herd of gimmicy things such as dynamic spacial expanders/dynamic range expanders autocoalation sonic hologaphy peak-unlimiters cant forget technics spacedemention
Think of the term 'ambience', or 'stereo wide' which is what they called the circuit that some boomboxes had to make the speakers outputs seem farther apart, 'wider' with some phasing processes.