Totally ghetto here, but I bought a "boostaroo" (google it). It is meant for gameboys and such, but it does amplify your signal... Its not the best (180 - its the worst), but it was only $20 and let's me hear my Matrix...
I also use the UA5 at my local bar... I don't recommend listening for long periods of time (hearing loss), but it should be enough to let you get an idea of what you're taping...
I also take my NJB3 outside during break and listen there in the quiet... I don't need the boostaroo there, though...
Good luck! And let us know how those MATs come out!
Terry