I just recently applied to guitar center, and had the interview yesterday. Everything was going fine and dandy until the manager asked me 3 questions, each having to do with different technical stuff. For example one of the questions was do you know the difference between so and so mics. I was wondering if there are any websites that I can look at to study. The manager said I should call him back later this month once I brushed up more on merchendise knowledge. Thanks in advance.