Steve, My personal experience (limited to less than 12 mpcs, and as an amateur player) is that the bore size has a strong influence on my endurance. A larger bore reduces my endurance and make the high range more difficult and 'airy' sounding. Too small a bore feels stuffy and I'm not able to 'open-up the sound'. Also, when I start to tire, intonation and range suffer - so adequate endurance is critical.
The mpcs that have been most useful for me are a #11 bore Holton DC, and a #12 bore Moosewood B12. Also, I've had best results with a 'medium' depth cup (e.g. the B12). Of course, all this must balance the ability and capacity of the player, and whether the pieces being played are at the extremes of the players ability. Jay Kosta Endwell NY amateur player ------------------ Steve Freides steve at fridayscomputer.com wrote: I noticed when cleaning my son's Yamaha 30C4 mouthpiece that it's distinctly harder to get my cleaning brush through the tubing that's after the cup portion. I'm pretty sure the bore (inside diameter) is smaller than the 7BW mouthpiece I play. So, two questions: 1. All other things being equal, if this bore is narrower, how would it change playing the horn? I don't want to use my son's mouthpiece (wouldn't bother me but it seems to gross him out) but I'm curious. 2. Is there a primer online anywhere that discusses the individual parameters of mouthpiece construction and how they change tone, perceived playing difficulty, ease of hitting high and low notes, etc.? I could use one. Many thanks in advance. -S- _______________________________________________ post: [EMAIL PROTECTED] unsubscribe or set options at http://music.memphis.edu/mailman/options/horn/archive%40jab.org