nnnyyy, no ACS54s aren't digital
I got the ACS56, one (big) step above the ACS54, one its digital, but only for the front
The ACS54s are for those of you who are on a budget and is not a bass person, the 4" driver on the woofer just doesn't cut it when it gets moderately loud. I am a bass person, and ACS56 all the way!! By no means are the 54s crappy, but my boss has ACS33s and they have a 4" woofer, just doesn't shake the floor or give your parents heart pain like the 6.5" ones on ACS56s do.