INDIVIDUAL SPEAKER FREQUENCY TEST 
  USED TO DETECT CORRECT WIRING OF SPEAKERS IN TESTED CLUSTER:
	


> The Low frequency test uses a 400hz signal to detect correct
  wiring of the woofer.


> The Mid frequency test uses a 4000hz signal to detect correct
  wiring of the midrange.
	  

> The Hi frequency test uses a 6000hz signal to detect correct
  wiring of the tweeter.