I'm going to build a 5.1 set-up for my sister and her husband for Christmas. I know they do not like big speakers so I am going to use a full range Tang-band driver for each of the five speakers. I want something small but good. I just don't know if I need to do anything more than put them in their appropriate enclosures. Do I need some sort of low-pass filter on them? Or do I need to use some other "crossover" components? I don't know anything about this part of the design process, so I thought I'd ask for some assistance. Here's a link to the driver I'll be using in each speaker: Tang-Band 3" Full Range Driver Thanks fellas!