|  1. Negative wire of the storage battery.  | 
 
 
 |  2. To turn out 8 screws and to remove from the shelf both back loudspeakers.  | 
 
 
 |  3. To disconnect electric sockets of loudspeakers and to remove them from a loudspeaker.  | 
 
 
 | 4. To remove mesh covers from loudspeakers.  |