hello Rick,
I have KRK 5G4 in a smallish room of about 12m^2. Let me clarify few things...
We need to be specific when we talk about bass problem. Bass has a frequency range of about 50Hz to 250Hz (roughly C1...C3 on keybed) and KRK 5 has no distortion in this range. I assume, the problem that you have, is sub-bass range below 50Hz (most left octave on Genos): there's no rich deep bass. But this cannot be solved with EQ. We must keep in mind that we're only applying EQ adjustment within range that the speaker is capable to play. We cannot force speaker to play below 50Hz by increasing EQ level in that range. If we increase too much, we will get distortion in the range that speaker is otherwise capable to play perfectly fine.
According to tests and specifications, KRK 5 frequency range starts at about 55Hz and the same is true for HS7 -and so you cannot expect any difference in sub-bass range. HS8 starts at 47Hz and even that doesn't seem to make some difference, it is much better (in sub-bass region there's a battle for every Hz).
Btw. there's no such thing as too much for small area -I mean, we can always decrease volume. The only thing that might be too much in this case, is speaker size. And if size is no problem for you, go for HS8.
However, HS8 will still not solve sub-bass problem, because starting at 47Hz is not low enough for that.
What I recommend is, that you keep KRK 5 and get a decent subwoofer.
Bogdan
