The original Sri Chakra established by Adi Shankaracharya can be found in a narrow depression in the temple.
The murti of Goddess Kamakshi that was originally worshiped in the temple was a fierce form. It is said that Adi Shankaracharya changed the fierce form and made her the all providing Mother in a loving form.
The murti of Goddess Kamakshi has four hands and she holds Ankusa, Pasa, and a Kapala. One hand is in Abhaya Mudra posture. The murti is more related to Tantric worship and the murti is also known as Kirtimati and Devagarbha.