EMPHASER EA490-200, Инструкция по установке и эксплуатации

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ground contact reduces the voltage, resulting in reduced power output and
high distortion.
2.6.6 Close the electrical circuit by inserting the main fuse.
After turning-on the head-unit, the „Power/Protection” LED of the amplifier
should light-up green. If the LED is red, the installation is faulty, turn the head-
unit off immediately and re-check steps 2.6.1 to 2.6.5. The same applies if
the amplifier LED does not light up at all.
3.1 Cross-Over Settings
The EA490-200 is a concept amplifier, therefore the actual speaker outputs
will receive HPF or LPF filtered amplified signals, and the speakers will only
have to work in the frequency bands they will reproduce best. Before the re-
spective sensitivity levels of the individual amplification systems can be set, it
is advisable to set the system appropriate cross-over frequencies for all spea-
ker systems.
Satellite High-Pass Frequencies (Front & Rear „FREQ. Hz”)
It is recommended to set the high-pass cross-over frequency between 50 and
250 Hz using the „FREQ. Hz” controls. The appropriate setting should be de-
termined by ear. The two most important factors for the individual adjustment
will be the reproduction of the mid-bass frequencies and the power-handling
of the satellites (cone excursion of the mid/woofers!). If the satellite cross-over
frequency is too low, the mid-bass reproduction will be increased, but the po-
wer-handling will decrease at the same time. If the cross-over frequency is
set too high, the mid-bass reproduction will become 'thin', while the power-
handling of the satellite speakers will increase. Try to find the settings that will
suit your personal listening preferences and the physical and electrical capa-
bilities of your equipment best.
As a general rule you can get good results around the following High-Pass
Recommendations:
Front Satellite Speaker System („FRONT FREQ.”) X-Over Freq.
10 cm/4” Coaxial or Separate Component System 90 Hz
13 cm/5” Coaxial or Separate Component System 80 Hz
16 cm/6” Coaxial or Separate Component System 70 Hz
Rear Satellite Speaker System („REAR FREQ.”) X-Over Freq.
10 cm/4” Coaxial or Separate Component System 100 Hz
13 cm/5” Coaxial or Separate Component System 120 Hz
16 cm/6” Coaxial or Separate Component System 130 Hz
EA490200 Manual 28.07.2000 16:11 Uhr Seite 14