TPA3255: I want to know the low frequency charactics of TPA3255 (below 20Hz)

Dear,

I am reading the TPA3255 datasheet.
   Figure  29.    Typical  Differential  (2N)  BTL  Application
   Figure  30.    Typical  Single  Ended  (1N)  SE  Application
   Figure  31.    Typical  Differential  (2N)  PBTL  Application
Let's assume that I use one of the reference circuit above.
I want to know the frquency response of 5~20Hz.
Please assume the load is the ideal 4 Ohm resistance.

Thank you for your help.
Jacob