To my last audition, I took a thein bass trombone - no, I didn't win the audition, but I made the sub list, which was the intended result.
To my last tuba audition, I took a Conn grand orchestral BBb and a Rudi 5/4 F. I wish I'd played the entire audition on the F which is a great horn. The 2nd valve on the old Conn stuck firmly in the down position in the middle of the Prokofiev, which just ruined my day. The horn had sounded wonderful when I had gotten it just a month pior, and I'd thought, "the valves work fine - I don't need to clean this horn before the audition" I'll never do THAT again!
Which horn have I won the most auditions with? #1 - Rudi 3/4 CC