MURPHY'S (AUDIO) LAWS

I.1 - All warranty and guarantee clauses become void upon payment of invoice

I.2 - Dimensions will always be expressed in the least usable terms. Velocity, for example, will be expresses in furlongs per fortnight.

I.3 - Identical units tested under identical conditions will not be identical in the field.

I.4 - A dropped tool will land where it can do the most damage. (also known as the law of selective gravitation).

I.5 - The probability of a dimension being omitted from a plan or drawing is directly proportional to its importance.

I.6 - Interchangeable parts won't.

I.7 - Probability of failure of a component, assembly, sub-system or system is inversely proportional to ease of repair or replacement.

I.8 - If a circuit cannot fail, it will. I.9 - A fail-safe circuit will destroy others.

II.1 - An expensive, obsolete transistor protected by a fast acting fuse will protect the fuse by blowing first.

II.2 - A failure will never appear until the unit has passed the final inspection and taken by the customer.

II.3 - A purchased component or instrument will meet its spec long enough, and only long enough, to pass incoming inspection.

II.4 - Manufacturers spec sheets will be incorrect by a factor of 0.5 to 2.0, depending on which multiplier gives the most optimistic value. For salesman's claims these factors will be 1.0 to 10.0.

II.5 - In specifications, Murphy's Law supercedes Ohm's.