Time coherence - how important and what speakers?


I have been reading alot about time coherence in speakers. I believe that the Vandersteens and Josephs are time coherent.

My questions are: Do think this is an important issue?
What speakers are time coherent?

Thanks.

Richard Bischoff
rbischoff
Roy, will you please tell us what the impedance ranges, sensitivity, amplitude response and power recomendations are for each of your speakers?
Those are listed at the bottom of our temporary home page at greenmountainaudio.com. What are not described there are the products made for custom install. Full website in a couple of weeks, after C-3 ships.
Roy is a marketing guru as well as speaker designer. Some may argue that positive word of mouth is the fastest most effective way of getting a product accepted in the marketplace. Positive feedback can be generated just as easily through intrigue as it can from hands on product experience. Having said that, it's extremely important for the product to meet or exceed the expectations heeped on it in order to sustain momentum. In this instance I can't think of a better way to penetrate such a subjective and fickle constituency than to go into their discussion forum and raise company and product awareness. By attempting to increase the basic education level of those who may be in the market for a new pair of bespoke speakers, Roy is establishing both credibility as scientist and a speaker designer. Given Roy's knowledge and practical experience, his knowledge transfer in this thread may have even served as a change agent for the way we listen and judge music reproduction.

When developing a bespoke product, there are always distinguishing elements that identify it as a "best in breed". In most cases this bespoke item is the product of creative engineering, which is based on solid principles of science, technology and ample testing, ultimately resulting in superior performance. No subjectivity is involved on the peformance, the product works at a level equal to or above the competition. To truly be bespoke, superior performance must be integrated into an aesthetically pleasing "wrapper" that displays the manufacturers attention to artistry, detail and craftsmanship. To round out the bespoke nature of the product the manufacturer must create a special customer relationship experience, which will ultimately generate word of mouth praise and in many cases a cult following. See customer loyality in the Marketing 101 handbook for further details.

Simply put, Roy Johnson believes he's created a bespoke product. By coming on this board Roy has introduced himself to many potential customers. By articulating his incredibly deep knowledge of physics/math and speaker design he's raising the credibility bar in our eyes and possibly changing the way we think about listening to music. By tackling the tough questions on this board and by calling some of us on the phone, Roy is building up a good customer relations strategy that should breed success, if of course the product lives up to expectations.

Roy is obviously very smart on a variety of levels, not the least of which is marketing. Most good marketers when trying to fight off larger and higher resource competitors will go after obvious flaws in the competition in order to add doubt in Mamouth Co. X and provide distinguishing characteristics that separate them from companies Y & Z. To be perfectly honest I am extremely impressed by this entire thread and the quality of discourse. I've not only learned a ton about speaker engineering and design, but have been introduced to a man who obviously has the passion and drive to develop a product that raises the bar in experiencing the reproduction of music. I haven't even heard Green Mountain Audio speakers, but I'm intrigued enough to make inquiries and learn more from people who have listened to his products. I'm intrigued enough to toss my perfectly good speakers aside and purchase a pair of C-3's. Now that is solid marketing! ;-)
Well, Roy could use some dealers so we could hear before we buy. I don't understand the resistance in that area.