Auralization is the process of simulating the auditory perception of a specific environment or sound source. When processed in real-time, it enables participants to be immersed in a virtual acoustic environment. However, when using a loudspeaker array for real-time auralization, there is a risk of unintended acoustic feedback which can distort the desired sound output. To address this issue, various methods have been proposed in the literature leading to various efficiency. In this paper, one selected method, a calibration-based feedback cancellation system was implemented and objectively evaluated both for a monophonic setting and for a 42-loudspeaker array dedicated to spatial sound diffusion. A feedback reduction of more than 25 dB was observed for each individual loudspeakers, and 27dB for the 42-loudspeakers system. Spatial Room Impulse Response were measured inside three rooms and measured a second time inside the auralization system. Reverberation Time and Clarity of both measurements were similar.