Help Please?!? I now have a Marantz SR5200 which has a fixed crossover point of 100hz. My main speakers are KEF Cresta 2's and a Cresta centre plus Jamo Surround 300's on th rear. According to the specs for all these speakers, they go down to 20 hz, but, to take strain off the amp and to protect the speakers, I set the speaker size to "small" on all of them, in theory handing over all bass duties to the sub at 100hz. But it just dosen't sound right. There seems to be a lack of LFE which tells me the sub crossover point is set to low, leaving a gap in the middle there somewhere. The sub is a Rel Q Bass. How do I find the 100hz point on the crossover dial when there are no markings on it? I have the ultimate platinum DVD to help me out by the way.