| Click on the "Northern Brass" ad at the top of the page. It's all explained in there. Bruce Lee would be more than happy to discuss them with you. In short, however, it is a mouthpiece design which is founded in digital technology and (as I understand it) uses entirely "radiused" intersections between the backbore taper and the bore, the bore to the final cup, etc. so that it plays "more efficiently" and is more reliably reproducible than "ye olden mouthpieces" which are generally modelled on a shaped cutting tool. But...talk to Bruce. |