Here I am hopefully demonstrating the reaction a speaker has to being in an underdamped amplifier configuration, commonly found in vacuum tube amplifiers. As well as over damped amplifier configurations, commonly found with Solid State. One is neither better or worse. When designing for hifi systems with multiple crossovers to tweeters, horns, etc - the over damped configuration is usually best. But underdamped guitar amplifiers have become instruments unto themselves, and the reason why many accuse solid states of being lifeless or not as loud as their vacuum tube brothers. Underdamped speakers bring with them more bass and the reactance of the voice coils and cones will enhance the high end. Solid State amps will only be strong in the mids by comparison, making it perhaps more boxy sounding.