Put a Pangea 9 gauge Power cord on it. Audio Advisor $60 two meters. The cord actually improves the bass. It is an immediate thing you can hear straight up.
I would say the 4B-SST2 has plenty of clean bass juice. It may seem more laid back because it is cleaner, more precise. more articulate.
I have played with a number of 'cheap' power options. The Pangea is the best deal.
(Going to a Pangea 14SE cord, I find the bass less, the highs more 'golden', everything clearer. I am putting the 9 back on later today, to rejudge my opinion of the 14SE.) (the 14, 14SE is for preamps etc)