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SETTING UP THE S•3-way USING A REAL TIME ANALYZER
• Turn off the High Frequency MUTE switch and turn up the High Frequency Level control until the
RTA reads 0dB at the crossover frequency.
• Now, press the LOW MUTE switch again turning on the low frequency output. Notice the reading
on the RTA at the crossover frequency. If the reading is 0dB, there is no need to adjust the delay
time and you can assume that the speakers are in phase. If the RTA reads less than +3dB you’ll
need to delay the low frequency.
• While watching the RTA display, slowly turn the DELAY control counter-clockwise until the dis-
play reads +3dB.
Setting the GAIN Controls Using a RTA
It is critical to set the GAIN output controls so that all the frequency bands combine to create an over-all
flat system response. Using a RTA to set the GAIN control will make it much easier for you to accomplish
a flat system response. Follow the steps below, separately for each side of your system, to set the GAIN
controls using a RTA.
• With the crossover set to the desired frequencies, press all the Mute switches to the ON position,
turning all of the S•3-way’s outputs off. Position your measurement microphone approximately
15 feet from your loudspeaker array at a level ranging from your chest to your ear. Now turn all
the GAIN controls to the fully counter clockwise position.
• Play a sign wave tuned to the crossover frequency, or connect the signal from a pink noise gen-
erator to your loudspeaker system, either from your mixer or directly in the S•3-way’s input. Now
turn off the Low Frequency Mute switch and adjust the S•3-way’s INPUT GAIN to "0’.
• Adjust the LOW GAIN control until the RTA has an average reading of OdB at and below the fre-
quency of the LOW crossover point.
• Turn off the Mid Frequency Mute switch and turn up the MID Frequency GAIN control until the
RTA reads the same average level in the MID band.
• Adjust the HIGH GAIN control until the RTA has an average reading of OdB at and above the fre-
quency of the HIGH crossover point.
At this point all of the frequency bands will be at the same level and your system will have a flat response.
After setting the levels you can use a graphic equalizer, like the Samson E62I, if you want set a particular
response curve to tune the speaker system for a specific sound.
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