Description
Lots of additional information are on a dedicated LX support website. You find your way to this LX support within the .pdf plan document.
Meanwhile, LX521.4MG marks the 5th generation of development.
While cabinet construction is unchanged and can be used for all five generations, there are improvements in drivers (e.g. L22MG) and in sound quality of electronics (e.g. 4-way cascaded ASP=Analog Signal Processor i.s.o. DSP)