3
MULTIPLE SPEAKER CONNECTION
PARALLEL- Each additional speaker decreases the load impedance
for the amplifier. The amplifier delivers more current and works
harder.
SERIES- Each additional speaker increases the load impedance for
the amplifier. Impedances higher than 8 ohms are rarely used for car
audio.
1.5 Installation- Input
Connections
Low Level, High Impedance, Gold Plated RCA Input
and Output Jacks-
Connect the input jacks to a source providing preamp
level outputs. Use heavy duty RCA patch cords designed
(+)
(
-
)
+
-
(+)
(
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4 Ohm
2 Ohm
PARALLEL CONNECTION USING 4 OHM SPEAKERS
A
M
P
L
I
F
I
E
R
O
U
T
P
U
T
(+)
(
-
)
+
-
(+)
(
-
)
4 Ohm
8 Ohm
SERIES CONNECTION USING 4 OHM SPEAKERS
A
M
P
L
I
F
I
E
R
O
U
T
P
U
T
L I N E
IN P U T
L I N E
O U T
4
for mobile applications . Run the patch cables carefully, maintaining as
much distance as possible from power, speaker, and accessory wiring.
Make sure the RCA plugs fit tightly for a secure connection.
Connect the output jacks to any component that can accept preamp level
inputs.
1.6 Installation- Check all Connections
Recheck all connections before reconnecting the negative(-) battery cable.
Insert the correct value fuse in the fuse holder at the battery before
attempting to turn on the system.
2. Operation
2.1 Operation- Input Level adjustments
Adjust the control marked “LEVEL” to control the input
sensitivity of the
DD1-1200
.
Turn clockwise to increase the
level, counter clockwise to decrease. Amplifiers will run
cooler and produce less system noise at lower level settings.
Consult an experienced installation specialist for assistance in
balancing the levels in multi-amplifier systems, or systems with signal
processing accessories.
2.2 Operation- Variable Subsonic Filter
The subsonic filter protects your subwoofers from over excursion at
frequencies that might damage your subwoofers. The frequency is
variable from 15Hz to 50Hz, and the slope is 24dB/Octave
2.3 Operation- Bass Boost, Remote Bass
Boost-
Turning the
“BOOST”
control clockwise increases the
level of frequencies around 45Hz by up to 18dB when fully
clockwise. Plugging in the remote control module overrides
the on-board control for remote operation and adjustment.
The remote plug –in jack is located next to the speaker
terminal block. You can mount the remote control on any
LEVEL
MIN MAX
BASS
BOOST
0dB 18dB
