I was at the higher end shop and ask them to play a pair of paradigm's for me. Told them to set it flat, with no sub. It wasn't a sec or two before i realizied that there was a sub still in the mix. He argued with me till i took him over to the some what hidden sub. This is the kind of s**t that most people don't realize is happening. It's sad that "some" audio places do this just to make a sale......