I have the same issue as XenonMan. The 7500 drives the speakers about 3 seconds after the 990 turns it on. The blue LED comes on about 30 seconds later. My amp is being replaced as we speak. Has anyone else seen this problem and what was the resolution

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Model 990/7500
Magnepan MMG, MMG-C,MMG-W
Velodyne 12" sub
Panasonic 60" Plasma