Bedienungsanleitung Rodek r 1500 a 2 (Seite 27 von 32) (Deutsch, Englisch)

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4.1 MINIMUM IMPEDANCE LOAD

The output stages of the RODEK amplifiers are designed

to give you extraordinary output power into 4 or 2 ohms

loads in normal stereo configurations. In bridged mode,

the minimum impedance load is 4 ohms. The amplifier

might suffer from thermal shut-down or even damage, if

these recommended minimum impedance load ratings

are not considered appropriately. The R1500A2 is stable

into 2 ohms.

4.2 SELECTING THE OPERATION MODE

The RODEK amplifiers feature an active crossover sec-

tion with full versatility and thus, offer different amplifi-

cation modes, which can be set by the operation mode

slide switch(es). The operation mode switch enables you

to configure each stereo channel pair to work in either

fullrange, highpass or even bandpass mode. Therefore

- before you get started with the settings of crossover

frequencies and input gain adjustments - you must se-

lect the appropriate operation mode for each channel

pair, depending on the speaker system that is connected

and driven by the amplifier. This will make sure that every

speaker system is only working in its proper frequency

operation range, for which the speaker was designed.

For example select HIGHPASS, if the speaker is a com-

ponent- or coaxial type, or BANDPASS in case of a kick-

bass or subwoofer system - and finally FULL(range) if

the passband frequency of the stereo channel is already

controlled by a head-unit with an integrated DSP based

active crossover.

4.2.1 HIGHPASS FOR COMPONENT

AND COAXIAL SPEAKERS

Before you start your adjustments, all tone controls (i.e.

Bass, Treble), fader/balance and the loudness function

featured on the head unit, must be set to their respective

neutral or center position.

Please take a look at the chart below, stating the recom-

mended high-pass cross-over frequency settings for

coaxial- and component speaker systems - and adjust the

highpass control of each channel pair that drives satel-

lites speaker systems accordingly. The most important

factor for the individual adjustment of the highpass cross-

over frequency is the reproduction of mid-bass frequen-

cies and the resulting power-handling of the speaker

system. This setting is always a compromise. Try to find

a highpass crossover frequency point, that will suit your

personal listening preferences and - at the same time -

also considers the physical (cone excursion) capabilities

of your speakers best.

Satellite speaker system, front door mounted, recom-

mended highpass frequency

10 cm Coaxial- or Component System 90 - 120 Hz

13 cm Coaxial- or Component System 80 - 100 Hz

16 cm Coaxial- or Component System 60 - 90 Hz

Satellite speaker system, rear mounted, recommended

highpass frequency

10 cm Coaxial- or Component System 100 - 150 Hz

13 cm Coaxial- or Component System 120 - 150 Hz

16 cm Coaxial- or Component System 130 - 150 Hz

4. CROSSOVER SETTINGS

R1500-4100A2 Manual.indd 27R1500-4100A2 Manual.indd 27 07.07.2004 10:59:11 Uhr07.07.2004 10:59:11 Uhr

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