Is this mouthpiece made to use baritone sax reeds only ?

This mouthpiece was designed for a pre WWI instrument. If you have a bass sax made after WWI don't waste your money. It will play very flat. Other things they neglect to put in the description are that if you return it, not only do you have to eat the original shipping fee, you also have to pay for return shipping. They say the baritone sax ligature will fit, but what they don't say is that it only fits a baritone reed. It will not fit on a bass reed. I kept the cap. In the end, it cost me $12.00 for the cap + $7.00 for shipping + $11.80 to return the ligature and mouthpiece for a total of $30.80 for a cap!

J'ai commandé un bec SYOS pour mon saxophone basse Couesnon car je cherchais de nouveaux sons et de nouvelles sensations.
Le redut dès la première utilisation était au delà des attentes et je l'utilises tous les weekends en fanfare de rue ainsi qu'en concert

Great mouthpiece for the bass saxophone, relatively bright sound, good projection.

I’ve been playing on an Otto Link STM bari mouthpiece that’s served me pretty well, and was a little skeptical about ordering a new mouthpiece (not a believer in magic bullets). I gotta say though, the difference is night and day. Deeper, more powerful sound, attacks are easier, the high range is suddenly way easier to play, tone is better. Definitely worth it!