Manual Emphaser ea 1800 d (page 14 of 32) (English, German)

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5.4 PHASE-SHIFT ADJUSTMENT

The phase shift function of the EA1350D/EA1800D can not be deactivated, as it is permanently in the

signal chain. The phase-shift control enables you to match the acoustical phase relations of subwoofer

and the speaker system playing in the front doors. The target is, that both speaker systems, normally

separated by aprox. 3m of distance shall play acoustically “in-phase” at the drivers seat location. A

good match of the acoustical phase between subwoofer and the system in the front doors will give

you the impression of bass sounds coming from a place in front of you. Or the other way round, the

subwoofer playing in the trunk of your car can not be localized that easily.

The second advantage is, that the upper bass region – i.e. where the sound waves radiated by the

subwoofer and the kickbass or front door mounted component system are crossing over - will sound

considerably more precise and tight. This phase adjustment can only be determined by ear, so you

will need somebody to help you to obtain best phase match. To judge the effect of the phase-shift

adjustment, you must sit on the drivers seat, and somebody must adjust the phase shift control knob

until the sound reproduction in the bass region is best. Furthermore, it might be necessary to invert the

(connection) polarity of your subwoofer – and re-adjust the phase, if you can not find a proper match

with the normal in-phase subwoofer connection.

Note: When two EA1350D/EA1800D amplifiers are run in Master-Slave configuration, only the

phase-shift control of the amp in MASTER mode will be active. The amp that runs in Slave mode has

its control functions deactivated – ALL settings must be done on the Master amp.

EA1350-1800D Manual (EDF).indd 14 28.02.2006 12:03:45 Uhr

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Emphaser ea 1800 d Manual

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