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Selector switch for various audio sources on the left channel.
Selector switch for various audio sources on the right channel.
Function to compare recorded tape output with the input source.
RIAA equalization circuit for vinyl record playback on the left channel.
RIAA equalization circuit for vinyl record playback on the right channel.
Controls for filtering out low-frequency rumble during playback.
Controls for filtering high-frequency noise or enhancing treble.
Adjustable controls for reducing high-frequency audio response.
The main transformer and rectifier circuit for power conversion.
Main power control and indicator for device operation status.