[quote=@Kimiyosis]
<Snipped quote by Xikari chan>

[url=http://tvtropes.org/pmwiki/pmwiki.php/Main/UpToEleven]Taking it Up to Eleven[/url]
Originally started due to a Guitar Amp company wanting to 'top' another in volume.
[/quote]

actually, didn't the amp companies start making those after the "take it up to eleven' scene in this is spinal tap?