One more thing what is the difference between the SM4 and the Dennis wick 4AL?
One more thing what is the difference between the SM4 and the Dennis wick 4AL?
I also own a Mack Euphonium and am using a Wick 4AL for a couple of years now. It works well and I highly recommend it. You can get a silver plated one for $62.95 at brass wind. The Mead Ultra is nice as well and I use it also. Either would serve you well. I would recommend that you consult a private teacher. One lesson would cost less than a new mouthpiece and can really help improve your playing. Best wishes in your search.
John 3:16
Conn Victor 5H Trombone
Yamaha 354 Trombone
Conn 15I Euphonium
Here is the link to Brasswind's offer ($62.95):
https://www.wwbw.com/Denis-Wick-DW58...ck 4al&index=3
One reason I like suggesting this one for 51D users is experience with a few people who have made that exact switch. Without going into your specific desires, I can say that the players who switched (one of whom is a well-known pro-level player) all sounded better on the 4AL and chose to stay with it.
Dave Werden (ASCAP)
Euphonium Soloist, U.S. Coast Guard Band, retired
Adams Artist (Adams E3)
Alliance Mouthpiece (DC3)
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I have played my Mack Brass euphonium on a CKB/UMI/King (all the same mp) 5G and it's a good match.
It's not the same mouthpiece as a Bach 5G. It's a bit bigger and a bit deeper and it works very well and is comfortable.
They are not shaped like Bachs on the outside, but look like Wicks-- i.e tulip shaped.
A good and usually inexpensive place to start.
These mps are no longer made, but you often can find them used in very good shape and for a good price. I bought a couple of new/old stock a couple of years ago that were still in the boxes.