Low-impedance headphones are in the range 16 to 32 ohms and high-impedance headphones are about 100-600 ohms. As the impedance of a pair of headphones increases, more voltage (at a given current) is required to drive it, and the loudness of the headphones for a given voltage decreases.
Yes, taking to much Vitamin D can cause some people to get diarrhea. Some others may experience constipation from to much Vitamin D.
With the vitamin D I was able ...I found that one of the rare side effects may be bloody diarrhea, blood in the stools, black and tarry stools but they mention this only happens as an overdose symptom..