LOW FREQUENCY SPEAKER TEST - 
DETECT PLACEMENT OF BASE IN SELECTED BACK CLUSTER:
	
> When you start the test, press the meter against the center of
  each speaker grill. 
  The meter should read as follows for selected BACK CLUSTER:

  - For woofers:  between 87 and 93 db
  - For midrange: about 84db 
  - For tweeters: about 84db

> If the speaker reads above or below its range, its wiring may be switched 
  with another speaker in its cluster.