Mute for Bass trumpet

[181Tubist]

I use a Silent Brass Trombone mute for my bass trumpet (Dotzauer).

[MikeS]

I've got an old Ray Robinson flugelhorn straight mute that works well on my bass trumpet. You might want to try a Humes and Berg flugel mute as a relatively cheap experiment. You will likely need slightly larger corks, depending on the model of bass trumpet you have.