open from the rear (plastic part).
what problem with ur subwoofer ??

Mine ACS48 too. The sub wooden box (actually chipboard material) become swollen due to water absorb.
Anyone know what type of material better for rplacement.
i prefer superior material over previous and provide some creeammyyy bass.

cs21 is a monster.....

cool....can teach me someday.
i'm taking e&e course, but due to unrelated careers over 5-6 yrs...become too noob alrdy

mine was bought by big bro in canada (still made in china). due to different volt range, the fuse went spooof here
brought to shop, then the technician told me need change "coil" <-this time i'm not in uni yet, so no idea.
he said this will downgrade power around 10W...but using till now..champs.

wanna re-made the subwoofer box.
is it possible to upgrade/boost the woofer perfomance? any guide?

as for satellite, i may replace the speakers+tweeter.