21
9. Lowpass crossover frequency control
, to adjust
the cut-off frequency of the channels CH3/4
10. Slide switch to activate/deactivate
the phase-
shift control
11. Phase-shift control
, to alter the acoustical phase
of the output signal
12. Operation LED
, is lit green when power is on
13. Protection LED
, is lit red when the amplifier is shut
down because of malfunction, overheating or short-cut
on speaker cable leads
14. Terminal block
for the speaker wire connection
15. Fuses
16. "+12V"
for connection to the positive terminal of car
battery
17. "GND"
for connection to chassis ground or negative
terminal of car battery
18. "REM"
for the automatic (remote) turn-on / turn-off
of the power amplifier from the head-unit's remote or an-
tenna control lead
1. RCA inputs
(CH1/2, CH3/4, left and right channels).
Line inputs for connection with RCA line-out’s of the
head-unit
2. Input gain control
LEVEL adjustment for channels
CH1/2. Used to match the RCA line output voltage of the
head-unit to the amplifier input section.
3. Operation mode selector
, slide switch to select Hig-
hpass, Bandpass or Fullrange operation of the active
crossover for channels CH1/2
4. Highpass crossover frequency control
, to adjust
the cut-in frequency of the channels CH1/2
5. Lowpass crossover frequency control
, to adjust
the cut-off frequency of the channels CH1/2
6. Input gain control
LEVEL adjustment for channels
CH3/4. Used to match the RCA line output voltage of the
head-unit to the amplifier input section.
7. Operation mode selector
, slide switch to select Hig-
hpass, Bandpass or Fullrange operation of the active
crossover for channels CH3/4
8. Highpass crossover frequency control
, to adjust
the cut-in frequency of the channels CH3/4
1. INPUTS - OUTPUTS - CONTROLS
R4100A_Manual 2002- 25.02.2002 16:36 Uhr Seite 21
