hifitech,

I, too, am interested in what exactly is meant by "quasi-crossover" or "lobing effect." Do they mean by "tapered crossover" a crossover design in which only one of the multiple (say, two) woofers is engaged in the higher end of the woofer's assigned frequency and then the other unit(s) becomes engaged at lower frequencies -- i.e. the currently "fashionable" design that has also been termed 2.5-way or 3.5-way?