Do games sound better with better equipment? I'm using the built in tv speakers on my Spinal Tap machine and they are probably better quality than any arcade machine ever had, but it doesn't seem to make much of a difference.
It really depends on the game.
I don't think you're gonna get hi-fi theater like sound out of Pac man, no matter how much you spend on speakers.
However, with some kind of sub, you'll get a little more bass out of games that will benefit.
My speakers are far from hi-fi and the sub is small but its makes a nice little difference for bass