You are correct. The Matrix series B&Ws require lots of juice to make them come to life, Now go try some speaker cables and speaker stands to improve them even more. Go to Lowes or Home Depot and buy 6awg multi strand wire (30 cents a foot). Run one in one direction and the negatvie in the other direction. Buy some gold spades at a car audio store to fit the large wire. Let them break in for three weeks then take them out of your system. The after a week put them back in. Tell us what you hear.
Peter
Peter