Hello I have gone up the ladder from the $499 before the new Great app,
to the very respectable 3000sb , then after hearing ,having the 4000-SB in m6 home , my brother owns the Ultra 16s , the 400 SB is a smaller version
the sb16 is just too Big for any med size room ,I have 20x16 x8 and the 16 are 200+ lbs each , my 4000sb is only 102 lbs each and only a bit bigger then the sb3000, but is more tuneful easier to integrate into the room then the SB 3000
it just has better defined controlled Bass .I only have one currently and fills the room nicely ,I only sit 10 ft from the speakers.