I am currently a senior in high school, and I will be majoring in jazz studies next year. I currently play a king 2B in jazz band and a school small bore Bach Stradivarius trombone for orquestra. I play a Schilke 45B mouthpiece for both ensembles. In college, i would like to keep up my orquestral playing, despite my major. I have looked at the Conn 88H and the Yamaha YSL-882O and like them both very much. My problem is that, since they are both large bore horns, I do not want switch back and fourth between two mouthpieces. I also have tried some in between horns such as the King 3B with F and the school horn i use, but i do not like either one that much. I would appreciate any suggestions...Thanks!

The solution that worked best for me ( I do a LOT of switching back and forth), was to find a mouthpiece for my large tenor and small tenor that had the same rim. The difference between the two is the cup depth, back bore, shank size, etc.
That way, they feel the same on your face and makes it far easier to go back and forth.
For me , that meant playing my small horn on a large rim with a shallow cup and tight backbore. I use the same rim for alto as well. The only time I switch rim sizes is to play bass bone. It has worked very well for me.

Denis Wick mouthpieces, from what I've heard, can work with you to actually solve this. That way, you can have 2 mouthpieces, but 1 rim thats interchangeable. It can be costly, but hey, down the road you won't be looking back at a pour investment. They also can match a mouthpiece set up on what your playing on right now, that way you don't have to completely change mouthpieces.

Thanks for the advice. I would prefer not to get a screw rim mouthpiece, because I'm so forgetful that I am sure I would show up somewhere only to realize that I forgot my rim. Instead, I think I would like to buy a mouthpiece with the same size rim as my Schilke 45B (24.30mm) because I like the way it feels and I can play low notes (down to pedal A flat) without a problem. The only problem is, I can't find large boar mouthpiece with a 24.3mm rim and a deep cup anywhere. If anyone has any more suggestions, I would greatly appreciate it.

You will probably have to get that custom made, unless Bach makes a large shank 17C, but I wouldn't hold my breath.Keep in mind there is a reason people don't make it in the first place. Just because you can hit notes down to pedal A on your current mpc doesn't mean it will match and sound will on a larger horn. A .547 horn is going to take a lot more air to fill. A mouthpiece that small will really restrict you and I really suspect your sound will be very edgy and thin.
Is there some reason why you absolutely need such a small mouthpiece?

Thank you for the advice Steve. The only reason I started playing on such a small mouthpiece is because my band director (a flute player) suggested it so I could hit high B flats and C's back in eighth grade, and I never really reevaluated my situation. I do realize it was probably a bad idea to start playing on such a small mouthpiece in the first place, but i did not consider the ramifications at the time. After reading your post, I went down to the music store near my house and tried out a bunch of different mouthpieces. The mouthpiece I liked the best was the Bach 7C. While my range is not as good (I can only get up to a high D comfortably) I do much prefer the sound. I also like the Bach 6 1/2 AL and 5G, but I do not think they would produce the sound that I require for Jazz. This leads me to another problem, I do not think that Bach makes a 7 large boar mouthpiece. Thanks for being so patient with me and my ignorance. Also, if I do need to get a costume mouthpiece, do you have the names of any specific companies you would recommend? Any more suggestions would be fully appreciated. Thanks.

Keep in mind that the depth of the cup and the backbore will have a LOT more to do with your sound than the rim size.
For lead playing I use a mouthpiece with a rim equivalent to a Bach 3, but the cup is shallow and the backbore is tight so I get plenty of edge when I want it. Doug Elliott plays an even bigger rim than I do and his sound and range are amazing.
Consider going to the music store and trying a large bore horn with a Bach 5G, and then a small bore horn with a 5GS and see if you like that?
When you go bigger in rim size, your range will take a bit of a hit. But if you are relying on such a small mouthpiece for your range, you have fooled yourself into thinking you have chops you simply don't have.
Do you have a private teacher? It may be time to start looking into some freebuzzing exercises and checking for other possible issues.

Another thing that you really want to keep in mind when looking at mouthpieces: Don't worry about how high you can play. Only worry about the quality of the sound output. Your range will increase over time even on the largest of mouthpieces if you work on the right things.

Like Steve, I also play on a 3. Mine is a Griego 3, and I don't have any problems in the upper register, regularly hitting high F's, G's, and even the occasional A. (doubles) Also remember, even pro bass bone players, playing on toilet bowl sized 1's and larger, can get up into that extreme high range.

All in all, try as many pieces as you can, and listen for sound quality, tone projection, and comfort above all else. Everything else, range, speed, even flexibility to an extent, will return as you get accustomed to it. Remember, you are finally moving away from tiny mouthpieces, so you will have to get used to this new airflow and size before those things return. But they will, I promise.

I use a generic 6 1/2 AL on my King 4B Sonorous for jazz band work, and then switch to a large shank version of my Euphonium MPC (Brian Bowman BB1) since it has a much deeper cup to warm up my sound for "legit" playing--->which is few and far between.

I would recommend a Conn 88H, Or Bach 42B if you can swing the cash and have several to choose from.

The trend for "Legit" Trombone playing lately is bigger and fuller.

If you want something cheap, check out the new Bach Soloist Trombone, see if you like it, and then try to find an older Benge 160F. They are the exact same horn!! And you can pick one up for about $600.

But if you like your King 2B, then try a 3B with an F Attachment, or a 4B with an F attachment. none of these are open wrap horns but play great.

I have several mouthpieces,but i only realy play one. I have a custom made marcinkowitz( i am sure that that is spelled wrong) that is for a small bore horn, on my large bore horn i use the same mouthpiece but i also use an adapter, this takes getting used to and you dont get the same feedback that you do with out it, but if you really like what you already have you may want to try it. (15 dollars is a lot less than a new mouthpiece) and if you dont like that you can always get a standard mouthpiece like a bach 6 1/2 for both large and small bore leadpipes.