It is clear to me that he need to purchase a new or used one, or find one to hire/borrow.I expect that the OP might ask to have it tested by someone near if they have one. Not sure how you twisted that into purchasing.
^That scenario^ is exactly when a DATS become more than a pretty box.First thing I Would is post the Model # of the sub..
I wouldn't have even made this thread without that info.