LOW FREQUENCY SPEAKER TEST - DETECT PLACEMENT OF BASE AND MIDRANGE IN SELECTED CLUSTER: > When you start the test, press the meter against the center of each speaker grill. The meter should read as follows: - For woofers: between 86 and 86 db - For midrange: between 76 and 76 db - For tweeters: between 80 and 80 db > If the speaker reads above or below its range, its wiring may be switched with another speaker in its cluster. - The woofer and midrange may be switched: - woofer reads about 84 db; midrange reads about 84 db.