1. Start with gain control set to minimum and the crossover control and bass
control rotated midway, to 12 o’clock.
2. Choose program material with substantial bass content and turn the
volume control on your head unit to three-quarters of its total output
(approximately 3 o’clock on rotary controls).
3. Adjust the gain control clockwise until the Protection LED flashes with each
bass note but doesn’t stay lit continuously.
4. Listen to your system, making a mental note of the amount of upper bass
present in your system.
5. Switch the phase control to 180 degrees and recheck for upper bass
content. There may be more upper bass, less upper bass, or there may be no
change. The position that provides the most upper bass is correct, but you
may choose either setting according to your taste.
6. Adjust the crossover control clockwise or counterclockwise until the
perceived output from BP112, as heard at the listening position, contains only
low-frequency information; i.e., you should NOT hear any vocals coming from
BP112 when you are seated in the normal listening position.
7. Adjust the bass-boost control clockwise or counterclockwise to suit your
taste.
8. Recheck the Protection LED to make sure it’s blinking with the bass but is
not lit continuously. If it is lit continuously, adjust the gain control
counterclockwise until it blinks.
Note:
Although this adjustment sequence will in most cases provide
satisfactory tuning, the actual process may include several readjustments of
each of the controls since their settings will interact with each other. If
necessary, consult your authorized Earthquake car-audio dealer for help in
tuning your system.
TROUBLESHOOTING
1. Power LED not lit:
fuse blown, head unit not functioning properly (no
remote voltage), faulty power, ground or remote connection.
2. Power LED lit but no sound output:
inputs not connected, head unit not
functioning properly (no output), head-unit fader control set incorrectly (2-
channel connection only).
3. Output from BP112 sounds muddy or distorted:
input gain set too high
(Thermal Protection LED lit constantly), bass boost set too high (Thermal
Protection LED lit constantly), head-unit output is distorted or blown.
