Whilst fiddling with my standard setup Concert stereo with BOSE to check all the speakers were working I noticed the following: If I put the fader fully to the rear, then balance fully left, I hear sound from the rear left speaker and the sub (so far so good). But if I then move the balance over to the right, I no longer hear anything from the sub (the rear right speaker works as expected). Similarly if I put the fader fully to the front, I get full sub sounds if I set the balance fully to the right, and no sub noise when balance is fully left. Surely this means that the sub is connected to front right and rear left outputs of the HU and means that If my fader is set to anything other than 0 I'll have unequal amounts of left and right bass going to the sub!? Is my BOSE wired wrong or is this the way it should be? Anybody else got the same result?