I enjoy identifying vintage audio gear in movies and TV shows. I've watched all of the Bosch seasons on Amazon. Every once in a while there is a shot of his home music system. The system appears to be a McIntosh 240 amp and a McIntosh preamp, Marantz turntable, and Ohm Walsh speakers. Season 7, episode 5, around 31 minutes, shows the system. Either the speaker cables are hidden or, more than likely, the system is a prop.