I have two ceiling speakers (in a bedroom). Unfortunately it appears that one speaker cable has been damaged somewhere along the route during the renovation works of my flat. The speaker itself has been tested by the installer and works fine. So it looks as something has either cut partially the cable or a screw/nail has been put inside. It is not possible to determine where the cable has been damaged as it goes a long way through walls/ceiling. However only one conductor of the speaker cable has been damaged.
Could I bypass the damaged conductor by using the undamaged conductor for the positive and then wire the negative connector of this speaker to the other ceiling speaker (which speaker cable is not damaged) so to as to share its negative conductor? Hence there will be 2 positive conductors for each speaker, but one shared negative conductor. Could I still get Stereo audio? Will the AVR negative connector be overloaded? Is there a piece of equipment to be used to potentially solve this problem?
For reference, the AVR is a Yamaha RX-V373.
Many thanks in advance for your help!