I'm curious about DI boxes as pre amps? I've heard of SansAmp bass driver EBS micro bass II MXR Building di boxes that function quite well as pre amps? Just plug it right into your power amp? Are there other bands and models similar to these? i would love to have my pre on my pedal board instead of mounted in my rack... And could some of you folks provide some input on what is available so I can make the smartest purchase for my needs?