QBSTA SMW12D4
Power range (RMS) 300 W 400 W
THD <1.0% Dual
Signal-to-noise ratio >90dB 2.5”
Frequency response 20HZ - 150Hz 4 Ohm
Input sensitivity, high level 0.9V - 12V 25 - 350 Hz
Input sensitivity, low level .3V - 5V 8 mm
Low Pass Filter 50Hz - 150Hz 29.1 Hz
Bass Boost 0 to + 12dB 64.86 L
Subsonic Filter 20Hz 79.2 in
2
/ 0.0511 m
2
Fuse rating 2x 25A 0.5734
Subwoofer 11 inch (actual 11.3”), 0.8 ohm 0.6448
Net weight 23 lb
88 dB
A Overall Diameter
14.17” 12.3125”
B Mounting Depth
4.72” 11.75”
All specications subject to change without notice
2
FEATURES
A. Power Status LED
There is a GREEN “power” LED that glows green when power is on and no problems are present. If the
protection circuit (PRO) comes on, it will illuminate the other LED RED.
B. Remote Level Control Port
You MUST use the Remote Control as this is used to set up level and See G on its functions.
Auto Power Circuit
The AUTO POWER circuit is for high level (speaker-level) connections. When the speaker level connections are
used AND the remote turn on wire is NOT used the subwoofer will AUTO POWER ON when signal is detected.
If the amplier detected no signal input, the amplier will auto turn o.
C. High Level (speaker level) Inputs
If your head unit does not have RCA outputs you can use the speaker outputs for the audio source for the
subwoofer. Use the supplied cable and wire harness and connect the outputs properly as shown in the
connection diagram in this manual (FIG2, PG5).
NOTE: NEVER CONNECT BOTH RCA AND SPEAKER INPUTS SIMULTANEOUSLY!
D. Low Level RCA Inputs
Low level inputs are the recommended way to introduce the audio signal to the subwoofer. If RCA outputs are
present on your head unit or other signal source (such as a sound processor - see FIG 1, PG4).
E. Power Input Terminal
Use 8 gauge COPPER wire!! NOT CCA type cheap-o deluxe wire kits!
F. Fuse
Do not use a fuse with a dierent value and NEVER replace the fuse with a wire or coin. The fuse is there to
protect the vehicle NOT the amplier/subwoofer.
SPECIFICATIONS
A
D
R- R-L- L- NC
R+ R+L+ L+ REM
REM DC
REMOTE
VOLUME
LINE IN HI -LEVEL
20A 20A
FUSES
+12V GND
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