Bass, midrange and treble

bass, midrange, & treble frequencies in octaves

bass	range in Hz
sub bass	31 to 62 (and lower)
mid bass	62 to 125
upper bass	125 to 250
midrange
lower midrange	250 to 500
mid midrange	500 to 1K
upper midrange	1K to 2K
treble
lower treble	2K to 4K
mid treble	4K to 8K
upper treble	8K to 16K (and higher)

A mid-bass woofer is a type of speaker that produces sounds in the middle-low frequency range. Speakers classed as “tweeters” produce clean high-range, or treble, sounds. Speakers classed as “woofers” produce low-range, or bass, sounds. "Subwoofers" produce the lowest sounds of all. If you break the sound classes down farther, you have sound frequencies classed as "midrange," a designation overlapping both treble and bass. Mid-bass speakers cover a span in the upper bass and lower midrange frequencies.

According to speaker type :

Sub-woofer

woofer

tweeter

According to frequency range :

Bass

Mid-range

Treble