I'm going to play it amplified through a PA with a subwoofer in a country string band, and use a portable battery-powered amp for spontaneous bluegrass jams at fiddle festivals

But the 2018 U-Bass models like the Journeyman have a different kind of piezo pickup, which appears to be the Shadow SH-064 (Shadow Electronics SH-064 4 String Acoustic Bass Bridge Pickup with Saddle)