Abstract: The invention discloses an electrotherapy device for generating specifically designed low frequency pulsed magnetic fields (Cnp waveforms). The device comprises a memory storing at least one digital Cnp waveform and a digital to analog converter converting the at least one digital Cnp waveform into an analog Cnp waveform for application to a subject. A processor communicates with the memory and is responsive to operator input and conditioning the memory to output the at least one digital Cnp waveform directly to the digital to analog converter thereby to bypass the processor. The electrotherapy device is useful for electrotherapy of a subject to modify a variety of clinical physiological, neurological and behavioural conditions.