Bedienungsanleitung Rodek r 680 n (Seite 25 von 28) (Deutsch, Englisch)

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5. CROSSOVER SETTINGS

5.4 ADJUSTING INPUT SENSITIVITY

To reach a maximum noise-free dynamic headroom from each

individual head unit/amplifier/speaker combination, it is impor-

tant to set the respective input gain controls correctly. The input

level settings determine the actual signal-to-noise ratio, and they

are also responsible for obtaining the maximum distortion-free

SPL (sound pressure level) from your specific setup.

Turn-on your head-unit and set the volume control to approxi-

mately 3/4 of full volume, while playing a dynamic track from

a CD. Slowly increase the LEVEL adjustment control of the

channel pair to which your subwoofer system is connected to.

Turn up the (sub channel) level control knob until you can just

about hear distorted bass sounds. Now you reduce the volume

level of your head unit to a "normal" listening level and "add"

all the remaining channel pairs, by turning up the correspon-

ding level controls - aiming for a balanced sound with a slight

emphasis in the bass range. All remaining channels, no matter

if this concerns rear mounted coaxials, component- or kickbass

systems installed in the front doors - must be balanced against

the main level setting of your subwoofer.

5.5 ADJUSTMENT OF PHASE SHIFT

CONTROL

The phase shift function of channels CH5/6 can be activated with

the corresponding slide switch. The phase-shift control enables

you to match the acoustical phase relations of subwoofer and

the speaker system playing in the front doors, either a component

or a kickbass system. The target is that both speaker systems,

normally separated by aprox. 3m of distance are intended to

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 adjust-

ment can only be determined by ear, there is no rule of thumb

to find a good match, and you will definitely need somebody

to help you. To judge the effect of the phase-shift adjustment,

you must sit in 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 correct

polarity subwoofer in-phase connection.

Ro 6-CH Manual_D+E.indd 25 27.02.2006 18:15:46 Uhr

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