Duracell 660 Powerstation to Run my System off of the mains?

Interesting discussion here.

Stromtank here.

Thank you! Very informative. I'm going to pass on the Duracell which has a "modified sine wave" which may be more like a square wave and look into the pure sign wave inverters. 

your amp and each component needs DC. However, none are set up to take straight DC. They need 120v ac and then they rectify it.

Your power bank has batteris, but does not provide DC. It has a relatively cheap inverter that proides crappy AC.

Your powrbank has a charger. The charger has to be at a slightly higher voltage than the battery. The charger is a simple, and likely crappy DC voltage since batteries don’t need a high quality DC source.

So if you plug your amp into the powerbank, you’ll be running off the crappy charger, through a mediocre inverter, to your normal power supply to your amp.

"pure sine wave" inverter is what the PS Audio power plant uses.  So why not stick with something designed for audio use?  

Jerry

I would try grabbing the low hanging fruit which I mean powering the components that have external wall warts with smaller lithium ion battery power banks. Usually that means the dacand a streamer, Sometimes a preamp. This is a good way to make cheaper components so much better. Your larger components that are built for AC power do not lend themselves to this approach as has been explained above