In paper I  a theory for generating electronically controlled acoustic shadows for environmental noise reduction was considered. In paper II  the theory was extended to complex high frequency sound from non compact sources. Finally paper IV  considers the practical applications of the theory. These studies show that deep shadows are theoretically possible. This paper considers the implementation of the theory into a practical multichannel free-field control system and its basic performance. Providing certain stability conditions are met, deep shadows > 60 dB are generated at the microphones, limited only by the ambient noise of the laboratory.