I have experienced, then read many posts in a variety of threads, regarding the issue of low signal from the subwoofer output of a multi channel connection for DVD audio and SACD playback on universal disk players. I have seen a couple workarounds such as using a car audio line driver to boost the level, to devices such as the Outlaw ICBM. I am hoping for any information anyone has regarding why it is this way, and to equipment (universal disk players and receivers) that handle this effectively without external equipment needed. The only brand I have seen, after downloading and reading many manuals, is Denon. Their receivers have an adjustment for the external input subwoofer level, that defaults to +15db. Their disk players also have level adjustments on all channels (although only in the negative direction, requiring all channels but subwoofer to be lowered significantly while leaving subwoofer at 0,) but they don't have lower priced universal players yet. Most other brands that I have found don't offer level adjustments on the players outputs or the receivers multichannel input. The few that I have seen don't have enough range to compensate for the 12-15db difference.