Indoors I use Allen's version of a Leslie (a "Gyrophonic") at dead slow speed. I don't know what "Smaart" is. Outdoors I use no subs, only the A-7s. Indoors I use 4 HSU (1220s?) which shake the house off its foundations at 16 hz. I would like to develop still more acoustic power outside and with more low frequency oomph, which is why I'm interested in adding to my present "array". However, since I live on a sandy cliff, I don't want to actually simulate an earthquake.