Aspects of the present invention are generally directed to using a flexible conductor for transmitting energy to a recipient's cochlea. The flexible conductor may be used to transmit mechanical energy, such as sound vibrations, to the cochlea from an actuator implanted, for example, in a recess in the mastoid bone of the recipient. The flexible conductor may be coupled at its distal end to a component of the recipient's middle or inner ear. In operation, mechanical movement (e.g., vibrations) may be transferred from the actuator to the middle or inner ear of the recipient by the flexible conductor. These vibrations then induce movement of perliymph in the recipient's cochlea to cause, for example, perception of the sound by the recipient.