Schematics Search Engine

Check out http://www.schematicfinder.com

Schematic search engine queries multiple websites and returns only pro audio schematic diagrams, all for free.

There's a huge database of guitar amp schematics, guitar wiring diagrams, guitar pedal schematic diagrams and lots of other pro audio schematics.

Don't hit the road without schematics of your gear, just may save your bacon out there.