Long time lurker posting again after many years. I was talking to a friend who is of sufficient years to have heard jazz live in the 50s. He says he saw bass players with Stan Kenton using amps in the 50s, specifically Don Bagley, who posts on TalkBass. I was intrigued. Is this true? Were they using pickups, and if so, what? Or were they miking the bass? Or is my friend's memory addled?