Ok. i now understand that it's only possible to have them sitting down. haha The little "black box" has a gray cable coming out of if with 4 small cables inside.. one white, one red, one blue, and one green... what do i do?

Hello!    I was in by basement today, and i found a pair of STAX SR-40!  I'm new to this whole 'highendsound' thing but when i googled them i found that they were very pricey indeed!    The connection is very weird. and it only connects to a adaptor i also found, SRD-7/SB.   How do...