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LR
LR
LOW INPUT
A-409
3. If RCA connection is not possible connect as sketch K.
4. SUBWOOFER OUTPUT connect to subwoofer speaker as sketches L = total impedance
2 - 8 ohms, M = total impedance 4 - 8 ohms, N = total impedance = 2 - 4 ohms. The amplifier
delivers the highest power at 2 ohms. The sound and overload safety are the best at 8 ohms.
K
Stereo amplifier speaker output
LEFT
RIGHT
-
-
+
-
-
+
-
-
+
A-409 HIGH INPUT
5. If the voltage printed at the back side (110 V or 230 V) is equivalent to your house voltage connect AC
INPUT with your house AC with the attached cable. Due to the high switch-on power at least a 230V/10 amp
(110V/20 amp) house fuse is needed.
6. Play your main amplifier at low level music with deep bass
7. POWER at On and LEVEL turn right until you hear sound from your subwoofer
8. At medium loudness adjust all knobs as shown below. The numbers are related to clocklike setting,
examples: 7 = 7 o'clock = far left, 12 = 12 o'clock = upright, 5 = 5 o'clock = far right
9. POWER OFF: amplifier is totally off = no electric power wasted
10. POWER ON: amplifier on = steady electric consumption 10 watts
11. PROTECT LED: lights up at faulty operation as too low speaker impedance / short cut, overload, overheat
12. CLIPPING LED: a short light up indicates that overload starts but it is still tolerable at very short bass
impulses. At stronger light up reduce LEVEL. At speaker shortcut, too low impedance and overload the
relay cuts the speaker and the LED steady on. After about every 10 seconds the circuit tests if the shortcut,
low impedance or overload has been relieved.
13. LEVEL SUB: 7=no sound, 5=maximum input sensitivity
14. HIGH CUT cuts frequencies above 7=40Hz, 8=58Hz, 9=80Hz, 10=110Hz, 11= 150Hz, 12=180Hz, 1=200Hz,
3=240Hz, 4=260Hz, 5=300Hz
15. BOOST LEVEL: increases the level at 7=0dB, 8=1.2dB; 9=2.4dB, 10=3.6dB, 11=4dB, 12=5 dB, 1=6dB,
Z=6.3dB, 3=6.5dB, 4=7dB, 5=7.5dB
LR
LOW INPUT
A-409
L
A-409
SUBWOOFER OUTPUT
+
-
+
+
-
+
2 - Ù
8
+
LR
Stereoamplifier
MAIN IN or AUX
M
A-409
SUBWOOFER OUTPUT
-
+
-
+
4
-
8
Ù
-
+
4
-
8
Ù
-2-
LR
LR
LR
LR
Poweramplifier
INPUT
N
A-409
SUBWOOFER OUTPUT
-
+
-
+
-
+
2 4 Ù
-
2 - 4 Ù
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