I've had the KEF THX speaker package for some time now including the 45B SUB. (used with a Denon AVC A1SE).<br />The problem is that the sub goes into 'sleep' mode when I'm listening to music at a moderate volume.<br />Is there anyway I can make it stay on without increasing the overall balance of the system. Also I'm looking at buying a 2nd one to help with phase consistencies in the room and to create a 'stereo sub' effect.<br />Can it be connected at both high and low levels without damage. (I intend to use the high level inputs for direct stereo, whilst using the low level input for surround sound). Is this a sensible thing to do, or should I invest in a single bigger sub, lik a REL Stadium?