I have been looking at the Euphonic Audio web site lately. I see EU,and others, claiming their cabinets/amps/whatever produce "uncolored" or "flat response" to the instrument that is input. Just how can one tell whether an amp or cabinet is coloring the sound of a bass? I can sort of tell the character of my two basses when they're unplugged. But, being unamplified, it's sort of hard to get a good feel for their sound. I couldn't tell whether my amps color my basses' sound or not. Are there empirical measures to determine whether or not a piece of equipment colors the sound of an instrument?