You can actively hear if you are have concentration or when you are doing daily activities. There is no limitation. While you are actively listening to subliminal meditation try to sit down or lay down in a comfortable position and relax your muscles and take a deep breath then focus on your mind and your purpose at that session.
You can also use visualization techniques and other unconscious mind programming methods that are defined. These methods are not necessary but they improve the session outcomes.
Headsets are also recommended but not all of them.
You are allowed to listen to subliminal meditation while you are working with computer, doing daily routines, at your office or whenever you like to (except while driving because meditation music may make you numb).
You can listen even if you are asleep. Choose one session and play it over the night. Thus, you can work on your subconscious some more hours.
Repetition is penetrating way to unconscious mind. Hence, it is recommended to listen to the album along day time and night time, as much as possible.