The biggest studio in town had some audio problems. It seems all their mixes sucked. This is a world class facility with world class gear. No one could figure out the problem so they hired a specialist from JBL to analyze their system.
This specialist was not cheap. First they had to pay the cost of flying him in, putting him up in a hotel, paying for his meals and transportation. On top of that was his $1500/day fee.
The JBL specialist arrived at the studio, listened to about 5 seconds of audio and then reversed the connectors on one of their studio monitors. Seems when they set the studio up, they wired their studio speakers out of phase.
It cost this studio about $2500 to pay a guy to flip over a banana connector. Total repair time: 10 seconds.