Hello, this is my first post here. I've been playing electric guitar for 5 years, and I've just recently started learning bass guitar as well. I have a Vintage Modified Fender Jazz Bass (no active electronics or pickups) and I'm currently recording directly into my Audio Kontrol 1 audio interface. My tone sounds decent, but many people say that a preamp and a Di box will improve your tone significantly. My Audio Kontrol 1 has an instrument input. Does this mean my signal impendence is already fine, therefore negating the need for the DI box? Or does it mean I don't need a preamp? Or could I still benefit from both of them? Basically, what I'm trying to ask, will buying a preamp and/or a DI box be worthwhile investments, when recording a passive bass into an instrument input on an audio interface? Also, I was considering buying a $50 Art Tube MP preamp (if in fact, I do need it). Is it possible that buying a cheap preamp could make my tone worse? Yes, I have read the FAQ, but I'm still confused about my specific situation. Thanks in advance!