EMPHASER EA13000SPL Specifications download pdf (Page 13)

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5.4 PHASE-SHIFT ADJUSTMENT

The phase shift function of the EA13000SPL 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 sepa-

rated 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 speaker 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. The 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 EA13000SPL 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.

EA13000SPL Manual (E+D).indd 13 24.04.2006 18:35:50 Uhr

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EMPHASER EA13000SPL Specifications Page 13