Filter
Top Products
20
Using AUTO EQ with the D2500 Digital Equalizer
When you use the D1500 RTA and the D2500 digital EQ
together they combine to create a powerful automatic
equalization system. You simply connect the two units
using D-Net or MIDI, connect a high quality measurement
microphone, like the Samson MM01, and then use the
D1500’s AUTO EQ feature to let the onboard DSP’s mea-
sure your system response and adjust the equalizer for a
flat response, or for any EQ response curve that you may
have saved in memory. Follow the steps below to use the
AUTO EQ feature.
Setting up Your Test Mic
• Using a standard XLR microphone cable, plug a high
quality measurement microphone, like the Samson
MM01, into the Mic Input located on the D1500’s rear
panel.
• Position your measurement microphone approximately
10 feet from your loudspeaker array, halfway between
the low and high frequency drivers.
• Next select the MIC input by pressing the GLOBAL
button until the display reads “Inp.” And use the DATA
WHEEL to choose “Mic”.
• Now, you may need to adjust the microphone input
gain so press the Global switch again until you see “MG”
and select +30dB to start. Press STORE.
NOTE: You may need to come back to this to make the
final mic gain adjustment once you start generating the
PINK NOISE at the desired operating level.
AUTO EQ YOUR SYSTEM
Once you have the Mic Input and Generator GAIN set you
can easily set the equalization curve for any loudspeaker
or system at the press of the single button. Just follow
these simple steps.
• Connect the MIDI OUT of the D1500 to the MIDI IN of
the D2500. and connect the MIDI OUT of the D2500 to
the MIDI IN of the D1500.
• Load program 00 on the D2500.
• With the measurement microphone in position, press
the AUTO EQ button. The display will read "Start: no".
Turn the data wheel to select "Start: yes". Press STORE
and the Auto EQ process begins.
• Now watch, and listen, as the D1500 actually measures
the system frequency performance and adjusts the
filters on the D2500 for a flat response. You can see
the D2500’s EQ filters being automatically set on the
D1500’s large LED display.
• You'll see on the D1500 that the D2500 curves are
changing and that the equalizer filters are being set.
• Press RTA on the D1500.
After a few minutes you'll notice that the frequency bands are
at same approximate levels.
•
Now, press AUTO EQ again and the AUTO EQ switch
will stop flashing and you will see the new equalization
curve displayed on the D1500.
Operating the D2500
with the D1500 RTA