With the wealth of knowledge members bring to AK, I wonder where it comes from, so a quick poll to see where some of the knowledge derived from. You may of course choose more than one and feel free to elaborate. Over my 60 years I have worked, generally part time, in many aspects of audio which have added to my knowledge and love of music and equipment. Been a disc jockey and engineer at a half dozen radio stations, mostly NPR and military, owned my own recording studio and audio instillation company for a while, sold equipment at military A/V stores, been an on call stage hand, and played drums and did engineering for a few bands. Now that retirement is approaching I hope to learn about repairing equipment and start an on line radio station.