HOME AUDIO DOCKING SYSTEM, SM.
HCD-GTK1i is the tuner, USB and iPod section in FST-GTK1i and RDH-GTK1i;
HCD-GTK2i is the tuner, USB and iPod section in FST-GTK2i.
MULTI CHANNEL AV RECEIVER.
STR-KM22 is the receiver section in HT-M22
STR-KM55 is the receiver section in HT-M55
STR-KM77 is the receiver section in HT-M77