Well there are some others persons I know, who do this, but there aren't many people doin' this..
I share with those people good songs witch are good for speakermasturbation( let's call it that way)
And yes this is my only fetisch and due that i'm straight as you are, I can't share the feeling in my relationship, because it's a girl. I think you can understand that. So for the speakermethod i'm into boys haha.
Now this is a fetisch....I can get horny of seeing a vibrating speaker, when it has a cloth surround, like the one on your video.
Pioneer has allot of those speakers too ( i mean home audio speakers NOT car audio).
Well if you still have any questions, I'll be standby.