JLab USB speaker won't work on tablet

I have a JLab X-Bass B-Flex speaker that works fine when I plug it into a USB port on my Windows 7 Toshiba laptop. Windows plug'n'play located the appropriate driver and installed it. It has always worked well on that laptop. When I plug it into the USB port on the TF700 keyboard dock it doesn't work. I think I need a driver (from JLab?) to get this thing to work on the tablet. I emailed/called Jlab but so far no response. Has anyone used on of these things on an Android tablet? JLabs web site says it work with Windows, Apple and Linux. Any ideas?