[Jack of all Trades]

Nigel Tufnel: ...What we do is, if we need that extra push over the cliff, you know what we do?
Marty DiBergi: Put it up to eleven.
Nigel Tufnel: Eleven. Exactly. One louder

[Condor51]

Marty DiBergi: Put it up to eleven.
Nigel Tufnel: Eleven. Exactly. One louder

LOL.
My wife says that where my amp is always set.