So, now I have several SACDs and DVD Audios, some of them utilizing the .1 channel. I am not sure, what the intentions of the mixers are: Sometimes I get the impression that the bass info is both on .1 and the main channels, so that owners of small satellite systems get there bass delivered even without proper bass manegement. But this would make it a double bass dosis for those with large main speakers. Does anybody know , what the guidelines for mixers are in this respect? Are there any SACDs or DVD Audios, that rely entirely on the .1 channel for bass reproduction, so one could not just switch of the sub if one has large main speakers? I know of no such disc, but would be interested in other opinions.