Quoted from beelzeboob:So you DO think audio mods significantly change stuff?
I found that the factory cabinet woofer speakers just don't produce enough bass. They simply are too small of a magnet which directly influences how much air the cone can move. As far back as Funhouse 1990, and up through modern Sterns, they all seem to sound a click or two better with a simple cabinet replacement of the 8-inch speaker. The rest of modding of your speakers, adding external subs, backbox speakers, amplifiers, etc is all based on what you are trying to do and personal taste. I don't like adding anything external to a pinball machine, so it limits me to in-cabinet 'pin for pin' mods.