Earthquake Sound Corp. | (800) 576-7944 | www.earthquakesound.com
Adjusting the controls
Use the following charts to record more desirable
data from test results.
11 MiniMe P63 Manual
There are two main methods for adjusting the level,
crossover frequency and phase of the Earthquake
MiniMe P63 to match a system:
Method 1 - Typical
By listening and making adjustments to suit your
preference.
Method 2 - Laboratory
By measuring the output and adjusting for a flat
frequency response.
Satisfactory results can be achieved if you make the
adjustments based simply on 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 procedures are for those who prefer a
more methodical and scientific approach. You will
need a test CD with low-frequency warble tones and
an SPL 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 VOLUME 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
to high, you will have a peaked response. Adjust the
crossover FREQ 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 phase controls. Keep your hands off the
VOLUME control as it was correctly set in Step 2.
Step 5.
Listen to the subwoofer. Resist all temptation to turn
up the VOLUME control. Play something with really
deep bass to confirm that your subwoofer is working.
40Hz
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