Correct me if I wrong...The thx in logitech website, u try click it in Z2300 product...I went in n search whick speaker gt Thx, most of it like jbl, klipsch but no logitech...

i always support altec, coz i'm using it now. haha....

VS 4121 really will kill ur house, actually u can lowered the bass to avoid loudness......tat will make ppl sick...

i tested once for loud, the performance is good......but normally i cant do it coz my housemates are all around........a bit waste i think....haha