I have a Sony CDP-CX220 200-disc changer. I understand that there are
some models in this series which, when connected via the Control-A1
jack, allows this machine to act as a slave machine and provide
"no-delay play" mode where the two machines alternate playing tracks
with no long gaps in audio.

Does anyone here know which models I can use with my CX220 for this?

Thank you in advance.