@dla123
The 26 pound weight of each of your speakers is much less than the weight of any other 3-way floor-standing non-planar speaker of comparable dimensions that I can recall, that I would consider to be of reasonably good quality. Such speakers commonly weigh two or three times that amount, and in some cases considerably more than that.
In most speaker designs a fundamental goal is for the cabinets to be as rigid and acoustically inert as possible, which usually means a good deal of weight relative to overall size. Also, I would expect that in general there would be some degree of correlation between the weight of the drivers, especially the woofer, and their quality.
On the other hand, though, there are a few designs which rather than attempting to suppress cabinet resonances attempt to have their effects complement the characteristics of the drivers. Many Audio Note models fall into that category, for example. But even in the case of many or all of the various versions of their popular AN-E model they have produced over the years, which are comparable in size to your speakers (and only have two drivers, rather than the three that your speakers have), weight is in the vicinity of 40 pounds.
So I would have to think that the 26 pound weight of your speakers, given their dimensions, driver complement, and 3-way crossover, most likely reflects significant compromises that were made in the design in the interest of minimizing cost.
Regards,
-- Al