xkcd2

Spinal Tap Amps

[[Nigel Tufnel of Spinal Tap is showing off his amplifier to a person, who varies.]] Nigel: These amps go to 11. Person: Is that louder? Nigel: It's one louder. Normal Person: Normal Person: Why not make 10 louder and make 10 the highest? Engineer: Engineer: But 11 doesn't have any units. It's an arbitrary scale mapping otuputs-- Nigel: Zzzz Smart Engineer: Smart Engineer: For $2,000 I'll build you one that goes to 12.

Wow, that's less than $200 per … uh … that's a good deal!