Re: Speaker wiring

[JShadzi@aol.com]

In a message dated 11/22/99 9:22:10 AM Eastern Standard Time, 
alexaudi@kki.net.pl writes:

<< Some time ago I replaced the head unit on my car and at the same time I
 replaced the factory ever-breaking rear active crossover with a passive one
 and also replaced the rear speakers (one of them was broken) with
 aftermarket ones. Now I'm not sure if the front and rear speakers work in
 the same phase. Is there a simple test I can do to determine if the
 speakers are not out of phase? I don't have the wiring schematics for the
 factory 10 speaker system so I had to figure it out using multimeter and am
 not sure if I didn't make a mistake. Thanks in advance. BTW, the system
 sounds quite nice, I'm just being anal ;-)
  >>

    That is not being anal, just doing the job right...out of phase speakers 
do not sound as good a in-phase speakers because many of the frequences are 
being cancelled, especially bass frequencies.  To the triained ear, out of 
phase speakers sound very distinct.  
When sitting between the speaker you will have a hard time identifying the 
source of the sound, and the sound stage will sound "hollow" in the middle, 
it almost hurts your ears.  By putting on some bass heavy music that extends 
the speaker, you will see that one speaker may not move in the same direction 
as the other.  By barely touching the cones you will feel that both speakers 
are not hitting your hand at the same time.  This can be remedied by swapping 
+/- on one of the speakers, and ensure that both rears are inphase with the 
fronts...HTH
Javad