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 conversational style, GBS is based on successful voicing experience gained from over 35 years in homes, dealer & manufacturer showrooms, and at audio shows. Get Better Sound is not about selling you another component. The only agenda is about making those components that you already own come alive in your room. See set-up tips from the guy who wrote the original Magnepan owner's manuals and who won 5 out of 7 "Best-of-Show" awards with his various audio show demos. http://getbettersound.com/whattheysaid.htmlGo on-site to an audiophile's listening room to see implementation of some of Jim's recommended techniques. A comprehensive review has been posted in Positive Feedback Online. For those who might be interested in reading reviewer Jeff Day's in-depth comments on the DVDs, please go to the actual review: http://www.positive-feedback.com/Issue59/better_sound.htm The only significant area where we disagree with Jeff is the price. He quotes it at $39.70, the regular price. However Quarter Note Press has it promotionally priced at just US $29.50 right now! Get Jim's acclaimed Quarter Notes newsletters free with your purchase - contact jim@getbettersound.com