I have 4.2 sv8 which comes standard with the 44owatt b & W system. Wheres the bass? The highs? The range rover sport comes with a Harmon Kardon system that is in every way better that this system. I don't know why Jag didn't use Harmon Kardon on the XF. The sub woofer is a joke. Even when you adjust the level on the sub, it makes no diffrence. I seriously doubt this is 440 watts. It is a very disapointing sound system and to imagine this is the upgraded unit. Anyone else have opinions on this system?