I have a living room system I built for my living room back in the 80s; built-in speakers flanking the fireplace at one end of a long narrow room that spans the front of the house (one reason I was pleased with the house) consisting of 2 Altec 15" woofers in homemade reflex cabs (one was the firebox), Altec 511 horns with no-longer-made Peavey drivers and (originally) a pair of EV T350 tweeters which I roasted long ago and whose place is now taken by Eminence drivers with Eminence tweeter horns), a 3-way 18db crossover I made with help from the National Semi audio/radio handbook and 3 monstrous amps (the only low-noise option back then since 2 of them feed the horns directly) and a good ole RS graphic EQ. The Pioneer preamp and various sources are not in use and I play youtube content over it these days.
The second is an all-digital system in my garage (which came about in 2009). It's big (45'x27' inside) and thus a great place for big speakers, again made from components (2 Altec 421a 15" bass, one Peavey 18" sub, 2 monstrous Atlas DR-72 horns with Atlas PD60 drivers and 2 small Dayton elliptical horns with Eminence neo ring radiator drivers). The amps are quite the contrast from the house system, small class T chip amps on boards that drive the efficient speakers to too-loud levels sans clipping. The source/preamp part of the signal chain is a pair of HP Elite desktops running simple soundcards, the 2nd machine being the crossover network, its soundcard a 7.1, perfect for 7 drivers. All the processors are plugins that work with foobar2000; all source is on the first machine, all filters are linear-phase FIRs built from RePhase which can also induce phase shift to compensate for, e.g., driver-induced phase shift. It's never finished and loads of fun.
