Bench Press or Dumbbell Press?
If you’ve been to the gym, you’ve heard many people ask coaches about the difference between bench press and dumbbell press, or which one is more effective. In fact, there is no clear answer to these questions. Because there are advantages and disadvantages of working with a bar or using a dumbbell. In addition, the answer to this question is more about you than the exercise itself. So if you want to work with very high weights bench press will be more effective for you. However, if you want to run your entire chest, the dumbbell press is more suitable for you because it provides more movement.
If you want to do bench press, you have the advantage of working with larger weights. However, since these large weights are operated by attaching to the bar, the end point of the movement is restricted. You can’t lower the bar lower than your chest height. However, this is not the case for dumbbell press. A dumbbell presser may not work with weights as big as bench presses, but he can stretch the movement a little further down the chest. Other than these, you are less likely to make mistakes in bench press than dumbbell press. Because the bench press bar can not go lower than chest height, you do not have a chance to put a load on your shoulders. This significantly reduces your risk of injury compared to dumbbell presses.
Via : http://www.chestworkoutstips.com