Bedienungsanleitung Rodek r 1900 n (Seite 29 von 32) (Deutsch, Englisch)

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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 approxima-

tely 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 corresponding level controls - aiming for a ba-

lanced 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 your RODEK amplifier can be ac-

tivated 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 distan-

ce 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

in-phase polarity subwoofer connection.

5. CROSSOVER SETTINGS

Ro 1-2-4-CH Manual_D+E def.indd 29 01.03.2006 10:55:38 Uhr

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