Why is my Galaxy tab 4 volume loud but the headphones volume is low what's wrong ?

[AC Question]

It's like I can play music and it'll say *headphone mode so when i turn the volume up while listening to music headphones are low, so i turn up the volume at 100, and the headphone volume is still low

 

[B. Diddy]

Welcome to Android Central! Does the volume get loud over the main speaker or Bluetooth headphones/speakers? Do other wired headphones have the same problem?