Hi, Recently changed amps from an Arcam av50 to a Yamaha DSP AX620 and after many weeks unhappy with the sound have finally settled for the current set up. Problem is the sub performance I have to turn the sub output up to 3/4 or full to get any effect (even then its not great) I seem to remember reading that some Yamaha amps have poor LFE output is this true? Is there something I can do to improve sub performance? Sub is a Paradigm PDR10, used without a problem on the Arcam I could NEVER turn it past half way. It provided a good deep bass now its faint and weedy! HHHEELLLPPP MMMEEEEE Have checked the connections and settings all OK. DVD play back gives better bass (just) but really poor via TV/SAT?