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7. ADJUSTMENT OF THE CONTROL FUNCTIONS
7.7 PHASE SHIFT CONTROL
The phase shift control - to be activated by the ON/OFF switch on channel section 5/6-CH - provides
you with a simple "tool" to match the front door installed satellite system with the subwoofer playing
in the trunk compartment of your car. The phase shift control is used to achieve a good match of the
phase (time) relation between satellite and subwoofer system.
Since the satellite speaker system and the subwoofer are playing in locations separated by at least
2.5m, there is always a time difference between these two speaker systems, that usually cross over bet-
ween 60 to 120Hz. But a difference in phase bigger than 90° will cause a partial cancellation of the
frequencies that are radiated at the specific crossover point. Two effects derive from this fact: 1. the
sound reproduction is not as tight as it can be, and 2. the subwoofer can easily be localized to play
in the trunk of your car.
There is no rule of thumb, so this setting must entirely matched by ear! The assistance of somebody
adjusting the phase shift in the back of your car, while you monitor the change of sound - complica-
tes this matter. At least, you need a buddy to help you and an optimised phase match between satel-
lite speakers and the subwoofer is well worth the efforts!
EA 6-CH Manual 12.03.2002 13:32 Uhr Seite 18
