my friend had a dead 990 too... and the Outlaws fixed and returned it within two weeks.

sorry your 990 will be down for a while. but they should be able to fix it.
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Outlaw Audio 990 pre amp
Adire Audio sub (SVS 12.2 driver)
CAL Alpha tube DAC
Parasound P/HP-850 2 CH pre
Pioneer PL-530 TT
Polk Audio SDA 2B
NAD 2600A amp
Danger Boy here