I once had a similar problem a number of years ago. It was corrosion in my circuit breaker box from water seeping in. Not a good thing.  I upgraded my electrical service and breaker box and never had a problem again. 
The unit can shut off when there is a power issue like a power dip, bad connections somewhere, bad breakers, corrosion in circuit breaker box, etc. More power needed with multiple components on including your subwoofers, can exacerbate the problem.
Double check all electrical connections including your electrical box.
Ron
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Ron
Processor: McIntosh MX170, Amp: Legacy Audio i-V7, Digital: Benchmark DAC3B, Roon Music Player, Oppo UDP-205, Apple TV 4K, Fire TV Stick 4K Max, Analog: Gold Note Pianosa Turntable, Gold Note PH-10 Phono Preamplifier, Donatello MC Cartridge, Speakers: Legacy Audio Signature SE Natural Sapele Pommele, Silverscreen HD Center, JL Audio e112-Gloss Sub
Last edited by Poppyhome; 12-31-2019 at 10:32 AM.
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