RCF 8004 vs AD Flex 928 vs AD Flex 918 vs QSC KW181 - The Ultimate Subwoofer Showdown

Unknown brand Acoustic Drive or AD for short, is kicking RCF and QSC's butts. Street Prices: AD Flex 918 - $1,499 AD Flex 928 - $2,350 RCF 8004 - $3,799 QSC KW181 - discontinued, $1,100 used