Earthquake • MiniMe User Manual
13
Adjusting the controls
There are two main methods for adjusting the level,
crossover frequency and phase of the Earthquake
MiniMe to match a system.
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Method One: Typical: Listening and making
adjustments to suit your taste.
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Method Two: Laboratory: By measuring the
output and adjusting for a flat frequency
response.
Satisfactory results can be achieved if you make the
adjustments based on simply listening. This is
Earthquake's preferred method as it allows the system
to be voiced based on what sounds the best,
whereas laboratory-flat frequency response can often
be clinical and less than exciting.
The following procedure is for those who prefer a
more methodical and scientific approach.
You will need a test CD with low-frequency warble
tones, and a sound pressure-level meter.
Step #1
Disconnect the subwoofer and run the main speaker
with a tone in its passband (80-100Hz). Measure the
level.
Step #2
Disconnect the main speaker and reconnect the
subwoofer. Set the subwoofer to its highest crossover
frequency. Set the level control of the subwoofer to
give the same sound pressure level with the same
tone you used in Step #1.
Step #3
With both the subwoofer and the main speaker
connected, measure the level of the tones at the
available frequencies. Because the crossover is set
too high, you will have a peaked response. Adjust the
crossover control to get the smoothest response.
Step #4
Use the phase control to make the response even
smoother. It has its biggest effect at the crossover
frequency. You can iterate between the crossover and
the phases controls. Keep your hands off the level
control! It was set correctly in Step #2.
Step #5
Listen to the subwoofer. Resist all temptation to turn
up the level control. Play something with really deep
bass to confirm that your subwoofer is working.
Control settings
Use the following charts to record more desirable data
from test results.
