Sony mhc-rg 470 mini Hi-Fi stereo system 10-1 hz bass test

I have this stereo system for 4 years in my room and i&more than pleased:) Output wattage of this stereo is 2x120 w rms and there is 4 speakers in one of the two box(1 mid ,1 sub and two tweeters). The sound is great,very clean though it can&play low notes very good because the tuning of those boxes is high,i guess above 40hz...and those cones moves very good! let me know what you think:)