Can one run both channels simultaneously on an old Fender Bassman? I know guitarists do it all the time with period Marshalls. Basically, the idea is to try and get both the bass boost (which sounds great) and the mid eq (I find not enough mids in the 2 band bass channel) at the same time. How would I do this? Is there a cable that is female 1/4 to two male 1/4s that I can purchase, so I could use a decent length instrument cable with it? Has anyone done this with good results? And lastly, does it matter which input I use on each channel? I know on the old Plexi guitar heads, you're supposed to use the top input of one channel and the bottom of another. I can't really experiment with this right now, as I'm at college 180 miles from the amp. Thanks for the help.