Paraliminals are enough for what they are used for. That is changing conditions in your lives to something you prefer. The entrainment on the Paraliminals help you to relax into the listening session.
Ordinary entrainment without verbal instructions like Paraliminals are largely self directed. You need to know what you want to focus on unless you are just planning passive meditation.
Most entrainment is focued on alpha and theta for a meditative state. Some add delta entrainment for better sleep or even to develop the skill of remaining aware at delta. They have been using Beta to assist ADD and ADHD related problems. There is still a lot of interesting research going into brainwave patterns and entrainment.
For general meditation alpha theta is what you need.
The Paraliminals already have the alpha theta entrainment and the 'stories' to help your mind focus on your purpose.
Alex
