FINALLY found the problem with the Sony home theater vs my old-cheap-speakers.
test using this
http://www.audiocheck.net/audiotests_subwooferkicktest.php
Sony = fat woofer -> the bass kick got destroyed (it have weird "after shadow" blrrrp)
old-cheap-speaker = tight woofer (it have the proper "after shadow" that not overwhelm the original kick/tone).
and i prefer tight woofer... i guess i purchased wrong speaker systems and will be stuck with it for years to come.
according to posts on avsforum,
Fat/flabby = more earth-shattering but with distortion
Tight = less earth-shattering but it punches you with distinct tone
wow...
25 dollars speaker is tighter than 250 dollars home theater O_O.
the only thing that sounds better on the sony/250 dollar are its satellites.
EDIT: i read that to make woofer more tight ->
- close the port (just tried using a bunch of socks and it do sounds tighter but still too fat sounding for me)
- reduce the body size (maybe ill stuff the inside with socks?)
- add more power (i dont know how to do this).