10
LU-12/LU-15 Manual
Earthquake Sound Corporation. | (800) 576-7944 | www.earthquakesound.com
Tuning Your Subwoofer(s
)
The Supernova Luminous is a “True Subwoofer” and
must never be operated above the sub-harmonic/
harmonic frequency range. Its frequency response is
limited by the built-in crossover which has an upper
end of 150Hz. However, in most applications, the
crossover should not be set above 80Hz. The Super-
nova MKV’s crossover is equipped with a fourth-order
Linkwitz-Riley
fi
lter (24dB/octave) which blocks vocals
from interfering with its performance.
When setting up the Supernova Luminous as part of a
home audio system, one must understand that the
settings required for music are di
ff
erent than the set-
tings for movie viewing.
FOR MUSIC
In order to set up the Supernova Luminous for music,
users must recognize the frequency response and limi-
tations of their existing front and surround speakers
(i.e. speaker sizes and SPLs).
(1) Position the Supernova Luminous in the corner of
the room
(2) Turn the sub around so that the controls are acces-
sible.
(3) Turn on the audio system, switch the surround pro-
cessor to “MUSIC” mode, and equalize the rest of audio
system.
(4) Connect the Supernova Luminous to the processor
using high quality (triple shielded) RCA cable(s).
(5) Set the FILTER to the maximum position (150Hz)
and the VOLUME to the minimum position (0).
(6) Optimize the subwoofer’s performance by rotating
the VOLUME knob to somewhere between the 10
o’clock and 2 o’clock position. This will fully engage the
ODL (Optical Distortion Limiting) circuitry, allowing the
ampli
fi
er to deliver maximum output with minimal
distortion.
NOTE:
Some audio processors come equipped with high level
voltage on the RCA subwoofer outputs. In such case,
you might experience some clipping even when the
Subwoofer’s volume is set under the 10 o’clock posi-
tion. One solution is to feed the audio signal to the Su-
pernova Luminous using only 1 (one) RCA input
instead.
(7) With the crossover opened to 150Hz, vocals will be
heard out of the subwoofer. Gradually rotate the FIL-
TER knob counter clockwise until the vocals are elimi-
nated (typical crossing point of 80Hz) .
We suggest keeping the Supernova subwoofer’s VOL-
UME knob between 10 and 2 o’clock position and con-
trolling its volume level through the output controls of
your surround sound processor.
In case the subwoofer becomes out of phase with the
main front speakers,
fl
ip the phase switch to correct
the problem. Note that maximum bass is only achieved
when the sub is in phase with the speakers in your
system.
Once you set up the proper mix of low frequencies and
sub-harmonic response that do not encroach on the
rest of the speakers, you are ready to set the Super-
nova MKV for home theater use.
FOR MOVIE VIEWING
The Supernova MKV can be set up to your preference.
There are no rules of thumb to how much bass is ideal
for movie viewing. Some people like to feel the over-
whelming bass as it brings the action and events closer
to real life. When viewing movies, a 10dB gain above
the music setting is often pleasant for a more realistic
feel of the movie.
If you prefer to have di
ff
erent crossover settings for
music and movie viewing, we suggest crossing the
Supernova MKV at a higher frequency setting and us-
ing the processor to control the desired lower crossing
point.