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SQLFW Powered Sub-woofer series
Run the power wire through the interior of the vehicle, under the carpet,
and to the sub-woofer’s amplifier. If this is something that you do not feel
comfortable doing, please ask a professional to help you. Be sure to lay
the power wire away from all signal cables.
•
+12V
: This is the main power input for the amplifier and must be
connected directly to the positive terminal of the car battery for
the amplifier to operate properly. It is important that a main fuse is
installed a maximum of 18” from the battery.
•
GND
: This is the ground connection for the amplifier and must be
connected directly to the metal chassis of the vehicle for the sub-
woofer to operate properly. A properly grounded sub-woofer can
be run harder and longer than a poorly grounded sub-woofer.
The ground on the amplifier should be as short as possible and be
connected directly to the vehicle’s metal chassis. Do not connect to
factory bolts of ANY kind. When attaching the ground to the chassis,
sand all the paint away from the contact point. A grounding block like
the Street Wires GT4 should be used whenever possible as this piece of
equipment has 5 times the surface area of a normal screw.
The gauge of the power and ground wire is often an overlooked aspect
of sub-woofer installation. The more power the sub-woofer receives, the
more power it will produce. Power cables have a natural resistance, and
will lose voltage by the time the power makes its way to the sub-woofer.
The large gauge diameter wire will hold more voltage over longer runs.
Also, by having a larger diameter ground wire, the sub-woofer can run
more efficiently. It recommends using a minimum of 4 gauge power and
ground cables to get the best performance.
•
REM
: This connection turns the sub-woofer on and off.
REM
connection
is used based upon the amplifier input source (high level or low level) and
if the source unit has current sensing technology.
Low level input: Use the
REM
connection if the amplifier is connected to
the low level inputs (RCA). Connect the
REM
to the source unit’s remote-
turn-on output. If the source unit does not have a remote-turn-on circuit
the amplifier can be connected to +12V using a switch powered from the
ignition switched circuit.
High level input: Determine if the vehicle’s source unit has current sensing
technology. If the source unit does have current sensing technology then
REM
is not required to turn on the amplifier.
