The difficulties imposed by actuator limitations in a range of active vibration and noise control problems are well recognised. This paper proposes and examines a new approach of employing Model Predictive Control (MPC). MPC permits limitations on allowable control action to be explicitly included in the computation of an optimal control action. Such techniques have been widely and successfully applied in many other areas. However, due to the relatively high computational requirements of MPC, existing applications have been limited to systems with slow dynamics. This paper illustrates that MPC can be implemented on inexpensive hardware at high sampling rates using traditional online quadratic programming methods for non-trivial models and with significant control performance dividends.