After a bit of research & searching I found the following:-
A post in a thread on the melodeon.net forum in January 2011 from an FR1 owner stated that following a software update the FR1 now has free bass.
So it would appear that when released, the FR1 did NOT have free bass.
I have not yet been able to find the FR1 update yet on Roland's web site, but maybe Roland themselves may be able to supply the update, if you contact them.
Presumably you would need to find out if the example of the FR1 you are going to buy has this update already installed.