BTW, Unfortunately Bag End ELF has no product as updates to their current version have been delayed since the pandemic.
Electronic Bass Trap Experience
Does anyone have any positive experience with the PSI AVAA C20 Absorber? Probably would need at least two. I prefer not to stuff more boxes and tubes into the room. I have all 4 corners of a symmetrical room (425 s.f., vaulted A frame 7-13ft) treated with 16” square rectangular tower traps but need a bit more management for the 40-80Hz octave. Thank you, Dave H