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In this paper performance of actively controlling diffuse fields using acoustic pressure minimization has been presented. The technique is -norm acoustic pressure minimization. The theory and simulations of pressure minimization over space and frequency using two-channel and three-channel systems are presented. This paper focuses on diffuse primary fields with two and three secondary sources. A constrained pressure minimization is also introduced in this paper, to control pressure at various spaces and frequencies. The results show that a good attenuation is achieved at the microphone location or desired range over space and frequency using a two-channel system and a three-channel system. Also the shape of the attenuation contour could be controlled using the proposed method in this paper.