Anyone else using this head yet? Or a BX1500 with the same issue? I ask because I have one and I am liking the sound but there are a couple of things that just don't seem right. First, I am getting a lot of amp hiss, I figured this is because it needs tweaked to find the right settings, but I found it doesn't matter how I adjust, weather I bypass the tube, or engage the equalizer, I am still getting the same cabinet hiss (tried multiple cabinets as well). Called Carvin and talked one of the amp techs he asked me to unplug my bass from the amp and turn all of the volume knobs to noon and see if it makes the the same hiss, and it does. He tells me it is probably faulty and sends another one. The replacement is doing the same thing, It cant just be coincidence that I got two faulty amps? I am under the impression that this is just how they are and I need to decide if I can live with it. Also if I plug in my Zoom MS-60B into the amp I get the Hiss with a high pitched hum as well.....anyone else using this combo? Can anyone confirm this? I appreciate the help.