finally got the icbm hooked up , quite the difference, can't wait to try it between the yamaha and the 7125, two questions if I may, on the sub level control there is a line is this a reference {no cut or no boost] and when the 7125 comes should the hookup be yamaha to sms-1 then to icbm then to sub, also I just want to say I appreciate all the help, especially GONK, he is a great asset to this forum