for me fl studio never had quality output after i got done with a song on it, havent used it in about 3 years, so my message doesnt help but i suggest u get a nice vst, like Spectrasonics Trilogy, it has all types of bass, acoustic-electric-synth, and its a bass module so you can tweak it out and get any frequency you desire specially for those sub hitz, i got it and it really works!