Hi, I've been running a Roland 707 through an Orange OR80 guitar head, into an 4x10 Ampeg bass cab, to get some crunch on the drum machine. I've been using the 'Hi' input on the amp. I've noticed that on high volume levels, the amps pilot light 'pulsates' with every instance of the kick drum. Basically it dims out somewhat every time the kick drum plays, and this doesn't occur on lower volume levels... Am I going to damage the amp? Thanks in advance for your help!