I needed less time than I thought to make up my mind about the need for subwoofers with the 8361A's. Remembering that I can only state what applies in my listening room with dimensions of (L x W x H) 15ft x 13ft x 8.5ft, and specific room treatments.
I was advised by Marcel Schechter at Genelec and made adjustments using the SAC and various comparative group profiles, which could be tested and compared at the same time. I ultimately selected the one that suits my ears and environment best and saved this to the monitors as well as saving it to the Genelec cloud.
Well, any semblance of superior midrange fullness that I favoured in the Revel F208's has now completely evaporated with the midrange that I am getting from my Genelecs. Also, and more relevant here, the bass is simply superb. So much so that I will now also have a pair of the original Velodyne DD12 subs for sale. (These monitors are truly proving to be cost effective!
).
So in short, "no", I do NOT need a sub with these monitors. Blown away, completely!!