The phrase "bass sound" refers to low-frequency tones or music notes that have a deep and powerful quality. It is the foundation or lowest notes of a musical composition or the deep, resonant sound produced by a bass instrument. Full definition
With big bass sound and full sound these small packages pack a large punch! (thewirecutter.com)
The system is optimally tuned to match the characteristics of an SUV, delivering clearer high - end sound along with a tighter bass sound. (topspeed.com)