Clipping prevention in switched mode drivers

A driver apparatus for driving a transducer based on an input signal comprising:

• a switching driver comprising first and second input nodes for receiving first and second supply voltages defining an input voltage and first and second output nodes for connection to the transducer, the switching driver being configured to switch one or both of the first and second output nodes between different switching voltages with a controlled duty-cycle to drive an output signal across the transducer;
• and
• a clipping prevention controller configured to control a gain applied to the input signal so as to provide limiting of the input signal to avoid clipping of the output signal, wherein the clipping prevention controller is configured to dynamically control at least one limiting threshold used to determine when to apply limiting of the input signal based on an indication of load resistance of the transducer and the input voltage to the switching driver.