Amplifier Owner’s Manual
© 2019 Stinger • www.stingerelectronics.com
GROUND
Connect to the negative terminal of the
battery or bolted to a clean, unpainted part
of the chassis of the vehicle.
REMOTE
Connected to sw12V, usually a
remote trigger wire coming from the head unit
or an ignition lead if one is not available.
+12V
Connect to positive terminal (+12V) of the
battery. A in-line fuse should be installed within
18 inches of the battery. A 60 AMP fuse is
recommended for the SPX700X4
Connections / Settings
SPEAKER OUTPUT
Used to connect the amplifier to speakers.
The SPX750X4 minimum impedance is 2 ohm
Stereo and 4 ohm Bridged. To bridge the Rear
channels, use Rear-Left(RL)
--
and Rear-Right
+
.
To bridge the Front channels, use Front-Right
+
and Front-Left
--
X-OVER (REAR/FRONT)
HPF - FLAT - LPF
is selectable. Select FLAT for full range
signal. Select HPF (High Pass Filter) or LPF (Low Pass Fil-
ter) to activate the internal crossover which is continu-
ously variable from 40Hz to 400Hz using
FREQ
SENS
Used to adjust the input sensitivity (Gain) to match
the input level signal. Continuously variable from 0.2V
to 10V. Adjust this with the help of a DMM and a test
signal or an Oscilloscope. See System Tuning section
for setup instructions.
FREQ
Used to adjust the crossover frequency when cross-
over is set to HPF or LPF. Continuously variable from
40Hz to 400Hz
CONFIG
Select either 2CH inputs or 4CH inputs depending on
your source unit capabilities. Select 2CH if only 2 chan-
nels of signal are available, this helps avoid having to
use Y-connectors to drive 4 channels with only 2 chan-
nels of signal available.
LOW INPUTS (FRONT/REAR)
Connect preamp signal cables from head unit
to these inputs. For a high-level signal, cut RCA
connectors and connect to speaker wires.
AUX OUTPUT
Provides a full range signal for an additional amplifier.
There is no signal loss if using this output.
SPX700X4
4 Channel Power Amplifier
SPX700x4
SPX700x4
POWER/PROTECT LED
Amplifier status indicator. Blue indicates all
systems working and amplifier is on. Red
indicates protection mode, from Thermal Shut
Down or Short Circuit (See Troubleshooting)
REMOTE LEVEL CONTROL
This port is for connecting the remote
level control knob. This allows up to 20dB of
volume adjustment. Level control is for Rear
channels only.
