Backbox speaker box set for SPIKE 3 pinball machines. These speaker boxes attach to the back of the upper speaker essentially enclosing them using the existing hardware in the machine. This helps direct sound forward toward the player and not echoing through the backbox. This is sold as a set of 2, 1 for the left and 1 for the right upper speakers.
Please note, these only fit Stern SPIKE 3 games and do not fit prior games or other manufacturers.
Stern reference #544-1333-00.