I dont know what ported or sealed means.
I can remove the amp and see the speaker, which faces the floor. There is a tube running to back of the cabinet, open end inside the cabinet, so I guess thats a port.
When powered up, the hum is coming from that speaker, not the amp as I first thought. Its vibrating pretty good.
I really dislike throwing stuff out if I believe it can be repaired, even if I have to get another Sub and Amp, at least I save the cabinet. Just not sure what to get.
The Soundstage "brand" was made exclusively for a retail Elec chain out here called Visions. Not even sure if they still use the name.
http://www.eriksonconsumer.com/soundstage.html
EDIT
http://www.svsound.com/t/sealed-vs-ported
Found this info. Maybe I need to just buy one as the Soundstage is likely come from a HTIB.