beautiful 4100, 62caddy!
In the picture, the volume is up, the mode is FM, the #1 speakers are on, but the meters are not lighting up.
Did you take the picture when the broadcast was silent?
I love my 4100.
Good eye but you missed the TAPE 1 button is depressed because the 4100 is connected to a CR7- on which I probably had the input selected for CD player that was not playing anything at the time the photo was shot.
I also have the MAC1500 REC OUT connected to the AUX 1 input of the MAC4100. Then by using the TAPE COPY 1>2 switch of the 4100, the volume of the MAC1500 can also be remote controlled by the CR7. The MAC4100 doesn't even need to be turned on when using the CR7 with the MAC1500 because the signal from the 4100's AUX to RECORD out jacks is passive.
The REC OUT 2 jacks of the MAC4100 are also connected to the 1500's TAPE MONITOR input.
The 1500's tuner can also be played through the 4100 and visa versa.