What is the internal setup for patching the acoustic sounds out of the 500 and cutting off the ht25 without using the fx out? I have a jtv, hd500 and dt25 amp. currently i have the link cable from hd to ht and fx out to mixing board and monitor acoustic sounds from my stage monitor. i want to be able to do the same thing but use the xlr left and right outputs on the 500.