Welcome, Willy. Even for listening to most music in the surround mode my view would be that you should use the CS(S300?)in bipolar mode for surrounds rather than the infinities. Except for recordings such as some multi-channel SACDs and DVD-As which put instruments discretely into the surround channels, the broader dispersion of the CSs should give a better effect. If you're not thinking of 7.1 the Infinities could possibly be used in another room.

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Enjoy the music, not the equipment.