How to change the sound of home to the sound of battery?

The battery is connected before the bridge rectifier, and the power supply mode is wrong.

The stereo is powered by a transformer dual power supply and a bridge rectifier plus and minus DC dual power supply. Two batteries must be connected in series, and the series point is connected with black line. The battery anode (24V) is connected to the output anode of the bridge rectifier (black rectangle) (one of the anode of electrolytic capacitor), and the battery cathode (24V) is connected to the output cathode of the bridge rectifier (black rectangle) (one of the cathode of electrolytic capacitor).