The Get Better Sound 3-disc DVD set is 5..5 hours of solid useful info. Get Better Sound is not about How Components Work (although it includes that info, when explaining why a tip works against "Audiophile Common Knowledge"). There are already plenty of books on high performance audio, written by experts in the field. They include mathematical formulae, technical discussions, and much more. They provide interesting reading and valuable information for those who enjoy reading these near-textbook types of resources, which explain How Things Work. Get Better Sound is about How to Make Your Components Work Better. Only one book and 3 disc DVD set is available from someone who has professionally installed and voiced many hundreds of systems around North America. Presented in a... Less