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Trumpet Discussion Discuss mouthpiece - leadpipe - gap in the General forums; how important is the (no-) gap between the end of the mouth-piece-shank and the beginning of the leadpipe ¿?¿?¿? the ...
  1. #1
    Piano User Kang-Ling's Avatar
    Join Date
    Oct 2009

    mouthpiece - leadpipe - gap

    how important is the (no-) gap between the end of the mouth-piece-shank and the beginning of the leadpipe ¿?¿?¿?

    the other day (with my simple measuring-"equipment") I had a look :

    for example: a Bach mouthpiece in a Stradivarius trumpet : there is practically cero gap between mouthpiece and leadpipe

    some other horns (because of the mouthpiece-receiver-design) have some huge gaps

    but - surprisingly - they don´t sound bad at all !!!....................................

  2. #2
    Piano User
    Join Date
    Mar 2007
    Gold Coast - 805

    Re: mouthpiece - leadpipe - gap

    Go to Bob Reeves website, he has some information on GAP!!

  3. #3
    Mezzo Piano User lakerjazz's Avatar
    Join Date
    Oct 2006

    Re: mouthpiece - leadpipe - gap

    A Larger gap will make a horn more resistant with tighter slots, while a small gap will make it more free blowing (than it would be with a larger gap but not necessarily free blowing overall) with looser slots

  4. #4
    Moderator Utimate User rowuk's Avatar
    Join Date
    Jun 2006

    Re: mouthpiece - leadpipe - gap

    Gap is NOT a must have, it is a nice to have. The differences are definitely not between good an great or good and bad. They are much more subtle.

    Bach mouthpieces with a Bach trumpet have gap all over the place. Schilke recommended no gap. Their shanks are also so thin/sharp at the end that one cannot speak of "gap". The same applies to many Monette mouthpieces. Dave Monette DOES take the distance between the mouthpiece and leadpipe seriously. I think that has more to do with the total length of the instrument than some gap with magical powers. I would not recommend adjusting the gap without getting the valves aligned. There is much more error in the bore there.
    Whenever I feel blue, I start breathing again.

  5. #5
    Pianissimo User
    Join Date
    Nov 2007
    Fayetteville, AR

    Re: mouthpiece - leadpipe - gap

    From what K. O. at Brass Spa told me, the gap changes the distance between notes just slightly. Like a slinky, smaller gap is like a compressed slinky that is very close together and a larger gap like an expanded slinky. Here's video from Stomvi USA Facebook page.
    Stomvi USA | Facebook
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