You guys are over-thinking this.
First off, it's an obvious troll thread. I don't doubt this dude is in to audiophile shit, and I don't doubt this dude tries to make money off of it, but beyond that....
Regardless, look at it like this:
Let's say you're 90, and on your death bed. In the bed next to you, sharing a room, is your best friend, but he's a devout Christian. He's 100% convinced, without a shadow of a doubt that he's going to heaven. You're...not. You're just a dude.
Don't you think, at that moment, your friend is probably happier than you are? Keep in mind, this has no bearing on whether or not he's actually going to heaven, but if this cat THINKS he is, it probably makes him feel better [also, to be completely fair, you don't know for certainly he's NOT going to heaven. I mean, you can't scientifically prove it, so, y'know....]
So, yeah, if you've made peace with your beliefs, and are 100% sure that there is no god, and you're cool with where you go when you die, then yeah, you might come close to being as happy as that dude, but, a). you'll probably never quite get to his level of happiness and b). eliminating ALL doubt, without something to help you through the process -- i.e. "faith", the idea that you don't have to explain everything -- is really, really, really freakin' tough, and a state most people don't ever get to.
So it is with this audiophile retard.
He simply "believes". Well, that, and he wants to scam people out of money with his beliefs. He's no different than an evangelist on TV in that regard. But the point is, he has faith in his "god"; in this case, his "eargasms". We can't prove it doesn't exist, because, really, for him it does exist. And we shouldn't begrudge that any more than you'd begrudge someone dying their belief in the afterlife, as silly as it may sound to the rest of us.