Boss Audio Systems B12ES, User Manual

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Panel Controls and Features
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1. Status Indicators
Green LED: the subwoofer is powered on and operational.
Red LED: the subwoofer is in protection mode and not operational. This problem is caused by input
overload, short circuit or extremely high temperature.
2. Input Gain Control
Adjust the input level of this subwoofer in order to match the output level from your source unit (head unit).
Important! Do not adjust the input level to maximum unless your input level requires it.
Follow the steps below to set your input level correctly.
a.
On this subwoofer, turn the input gain control to minimum.
b.
On your source unit, turn the volume to about 3/4 full level.
c.
Slowly turn up the input gain control until you hear a small amount of distortion. Then turn down the gain
control until the distortion is completely gone. Leave the gain control at this setting.
3. Phase Control
Press to improve bass response (no or little bass sound) caused by time alignment problem in the audio
system. This problem usually results from having this subwoofer at a different distance from the listener
than the other speakers in the audio system.
4. Low Pass Filter (LPF)
Use this control to define the frequency range you want the subwoofer to receive. The subwoofer will only
receive the frequencies below the one you set to reproduce sound.
Tip: If the other speakers of your audio systems are weak on the mid frequencies, set the LPF control
relatively high. If the midrange is well covered by the other speakers of your audio system, set the LPF
control relatively low to only receive lower frequency signal.
5. Bass Boost Control
Use this control to increase sound output level of the bass frequencies.