I bought an isp pro rack g w/ stereo mod and its an amazing piece of gear but the only problem i have is that i bought when i use to have my 5150 and it had an effects loop but i recently the 5150 and bought a different head that has no loop thus making my $500 i wasted on the isp a complete waste. The problem i have with my new head is that theres background noise coming in when its on past halfway and i cant figure out how to take it away because of the lack of the effects loop. Any suggestions to solve this? I also use a 808 in the front as a clean boost btw.