Apologies for hijacking a previous post regarding playing backing tracks.

A "sound guy" friend turned me on to a possible USB Interface that would connect from my android tablet to my Boze L1.

https://www.crutchfield.com/p_838USBCDAC/Astell-Kern-USB-C-Dual-DAC-Cable.html?tp=59282

This would be used instead of coming out of the headphone jack directly into the Boze. It looks like a good portable solution.