The PSB Imagine T2s I owned previously came with rubber bungs for the 3 ports (like the PSB whose FR plot I posted earlier). I also preferred the sound with the ports closed but it sounded constrained at higher volumes.I now own Hedd actives and you can choose ported or sealed (there are bungs and DSP settings to accommodate both). I’ve tried both. I prefer sealed.
I ended up closing just two of the ports becase this produced the flatest bass response.