In my years as an audiophile, I have met many artisan audio designers who I count among my most respected 'musician' friends, whose mission is to create not just fine audio equipment, but true musical instruments. Some of these artisans are performing musicians (and quite accomplished). Regardless, all have one key trait in common, and that is they allow live music to be the key informant in the development of their audio designs, and ultimately the guiding beacon of their company's direction. One of these artisan friends is Alberto Guerra, founder and chief design engineer of AGD Productions, Inc., based in Palos Verdes, California.