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Introduction
With the PLBX10A, we are introducing a low-prole amplied subwoofer. Low enough to
easily t below the seat of your car. This system oers you a quick and easy way to add a
high-powered subwoofer system to your audio system.
The integrated amplier in the PLBX10A features low pass crossovers, and a control for
adjusting the input sensitivity from 0.12V to 3.5V.
Both high level (speaker level) and low level (RCA type) inputs are present, making this a
universal solution for use with any head unit or other input source.
For further exibility in the use of a subwoofer, a variable bass boost control has been
included. You can control the subwoofer level with the remote level control module.
Mounting the Subwoofer
1. Find a suitable location in the vehicle in which to mount the amplier.
A typical location is shown below:
2. Make sure there is sucient air circulation around the intended mounting location.
3. Mark the location for mounting hole screws by positioning the cabinet where you wish to
install it. Make a small mark to identify the position and remove the unit. Thoroughly clean
the area you plan to attach the subwoofer, using a vacuum cleaner and press down on it
securely.
Control Panel and Features
1. POWER ON LED INDICATOR
2. PROTECT LED INDICATOR
3. PHASE SHIFT: Use this switch to help compensate for time alignment problems in the
system. Such problems usually result from having the subwoofer at a dierent distance
from the listener than the other speakers in the system.
4. LOW PASS FILTER: This control permits you dene the ferquency range you want the
subwoofer amplier to receive. The subwoofer will reproduce all sound BELOW the
frequency you set. If the rest of your system is weak on the mids, you may wish to set this
control relatively high. If the midrange is well covered by the rest of your system, you will
probably want the subwoofer to only receive lower frequency signal.
5. BASS BOOST: The bass boost feature will increase the sound level the bass frequencies.
6. INPUT GAIN CONTROL: After you have installed your system, turn this control to minimum.
Turn the head unit on (and the subwoofer will turn on via the remote connection or high
level input DC OFFSET turn on). Turn the head unit volume to about 2/3 full level and turn
the remote level control to maximum. Slowly turn up the subwoofer input gain control
until you hear a small amount of distortion. Then reduce the unit level or remote level
until the distortion is completely gone. Leave the control at this setting.
7. REMOTE LEVEL CONTROL PORT: Attach the included remote level control to cotrol the
volume level of the subwoofer independently.
8. 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 PLBX10A. Use the supplied cable
and connect the outputs properly as shown in the connection diagram in this manual.
9. 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).
10. FUSE: The fuse is rated at 25A. Do not use a fuse with a dierent value and NEVER replace
the fuse with a wire or coin.
11. POWER TERMINALS
