Hello,
After much research, I ended up purchasing a Littmann Classic II SE. However, once I received it and tried to listen to my own heartbeat, I could barely make it out. I had to strain to listen to it. I thought it would be very easy to hear and audible/loud, but it was pretty subtle. I know it may be that my heartbeat is more faint than others' as I haven't tried it out on other people yet. And yes, the earbuds were in the correct way and the ear pieces fit perfectly. I also made sure that the diaphragm was open and the bell was closed.
Could it be that I'm just not used to auscultating and picking up sounds yet? Or maybe my hearing? I've never thought that I had hearing problems at all..Also, if I end up changing stethoscopes I am thinking about getting the Cardiology III as many people have said that it is loud and clear but I am worried that even after the extra money, that it won't make a huge difference. Any suggestions/advice?