Theres another thread circulating about Concept.....I think its mainly related to their amps, which are liked pretty well. No idea on the swiss audio though, but I think a couple people here run them, might wait for them to chime in.
Concept has been a great line for me and my store for years. Recommend it for sure. Swiss Audio is another branch of Audiobahn, which is another branch of Pyramid...... so say no to Swiss Audio.
all you swiss audio haters----lol. you've never heard mine. i ran the spl1290 subs and they by far outperformed my 12" jl w3's in in sq and in pure spl. are they the greastest=no but swiss audio was audioblings attempt to make some legitimate good products. Now with that said-swiss does offer a lower line which i will not vouch for. I've used they're amps as well and had great luck with them. and before anyone asks---yes i have used great products like JL, Memphis and a myriad of other products over the last 16 years of my car audio experience.
At least a couple people on here run Concept amps.....PM Netherland24 and Psychoticnemes.....they both have the 1200, and if I recall correctly, like them pretty well.