Yes, the Junior AlNiCos are rear ported. The cabinet profile is 7 inches deep, which is shallower than most tower speakers. That allows me to position them about 12 inches away from the front wall.
You remind me that I should take time to compare stealing a little more space away from the wall, maybe 6 inches, with their current location to see if I can hear a difference. I should slide them out for critical listening sessions.
That said, the bass sounds good to me. I don't find the bass booming or cancelled out. I've been happy with them for the past 5 months.
I wish I could have them further from the wall, but alas, because they are in the living room, it's a compromise.
Thanks for your question and I hope it helps. I'll post the results of my listening trials.