When AM band is turned on, it will switch to AUX. Minus can be soldered anywhere to ground on the board

AUX should be directly plugged into the radio block. Only one cover needs to be removed. It's preferable to add mass from the battery, as the initial upper head takes it from the lower body case, and also feed power through a capacitor to eliminate interference.

If you are listening to modern music, it is desirable to connect speakers via an amplifier in a bass-free mode, since the standard radio does not have a bass filter.

Attention! It will work only on this radio! Otherwise, you can burn out the DAC.