I can understand why you would ask if your vibration is emitted out through your crown chakra, as it is mind that ultimately brings you what your are wanting in your life.
The vibration we emit is in fact caused by our thinking, but that doesn’t necessarily mean that the crown chakra holds all the power. Everything is coming into the crown and going out of it, but all of your energy centers are affecting your vibration. Each of your chakras is directly affected by your thinking. If you are unstable financially and worried about money, then your root chakra will be affected because it is responsible for your ability to feel stable in the world. If you are very inhibited both sexually and expressively then your sacral chakra will reflect that energy. So depending on your life experiences and how you handle them each one of your chakras will tell the tale. The more balanced and open your energy centers are, the higher your frequency will become.
So you see, you need all of your chakras to be in balance to emit the highest frequency possible. Our frequency is something that changes daily depending on our emotions. Doing a chakra meditation and becoming aware of our energy centers can be of great value to you. Not only can you manifest what you want more easily, but you will be much more healthy physically.
Look at your chakras as a barometer of your health. Learn how to manage them and keep them open and spinning.
Check out my website, www.yourpainismypain.com, where I have several articles that talk about chakras. Read, How Your Chakras Affect your Destiny and Kundalini Rising Experience.