Pre-1960s Selmer to low Eb with left Eb-Ab key. I've played better horns by Selmer and Buffet, but mine is OK and it's loud!
I use a Selmer D mouthpiece-an old one. Again, I've played better mouthpieces, but I'm used to this one.
I remember my first gig with Liza Minnelli 25 years ago - heavy bass clarinet and they wanted it LOUD! I actually refaced my bass clarinet mouthpiece between the 1st and 2nd rehearsals, just to give Liza's musical director what he wanted.
Back in those days I had very long hair - to the middle of my back. Third night on the gig, as Liza walked onstage, she stopped by my chair, leaned over, messed up my hair, and whispered into my ear, "I've wanted to do that for three days!" Thanks, Liza! I'll never forget that gig - great band, great charts, and a hair raising encounter with Liza.