This study reports the results of work carried out to investigate the high-frequency periodical break-up process of a liquid jet using an electrohydrodynamic (EHD) multimode jet stimulation device. The aims of this study were to optimize the different parameters and to generate droplets of conducting fluid in a controlled fashion. In particular, the experiments were performed for wavenumbers k ≤ 0.5 with the second harmonic purposely introduced in the excitation signals. A dimensional analysis applied to the problem provided the main dimensionless parameters whose influence on jet break-up mechanisms were examined. We found different regimes of break-up depending on both the electrostatic pressure ratio and the phase shift between the fundamental and the second harmonic. In addition, various patterns of drop production and boundaries between regions of parameter space with different drop break-up behaviors were clearly identified using image processing techniques. Other features of jet break-up such as satellite droplet diameters and lifetimes were also considered in detail. Finally, our focus was to find the most suitable conditions for jet printer operation.