Crossover Settings; Minimum Impedance Load; Selecting The Operation Mode; Highpass For Component And Coaxial Speakers - RoDEK R2100A Installationshandbuch

R4100A_Manual 2002- 25.02.2002

4. CROSSOVER SETTINGS

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. We put empha-
sis on the fact, that the amplifier might suffer from ther-
mal shut-down or even damage, if these recommended
minimum impedance load ratings are not considered ap-
propriately.

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 fre-
quencies and input gain adjustments - you must select
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 compo-
nent- 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 con-
trolled by a head-unit with an integrated DSP based ac-
tive crossover.
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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 co-
axial- and component speaker systems - and adjust the
highpass control of each channel pair that drives satelli-
tes 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
13 cm Coaxial- or Component System
16 cm Coaxial- or Component System
Satellite speaker system, rear mounted, recommended
highpass frequency
10 cm Coaxial- or Component System
13 cm Coaxial- or Component System
16 cm Coaxial- or Component System
90 - 120 Hz
80 - 100 Hz
60 - 90 Hz
100 - 150 Hz
120 - 150 Hz
130 - 150 Hz
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