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ADVANCED EQUALIZATION
PERFECTLY FLAT CURVE
This section is designed for people who will use the DEQ 30 in competition or people who desire the ultimate
performance in their system. The DEQ 30 not only performs all of the equalization in the digital domain, it also has
the ability to adjust equalization independently for the left and right channel. To fully take advantage of the DEQ
30, it is recommended to use a RTA (Real Time Analyzer). Several companies offer excellent units: Audio Control
3050A, Coustic RT33, Linear X PC RTA. In this section we will use the RTAs to evaluate and tune the DEQ 30.
An RTA (Real Time Analyzer) is a measurement device that provides a visual display of a system frequency
response. Typically, this response is displayed in 1/3 octave bands. A 1/3 octave display has enough resolution to
detect non-linear frequency response problems. Optimized to work in conjunction with the RTA, the DEQ 30
frequency centers correspond to the frequency centers of an RTA.
For a system to have decent sound, there needs to be a relative smoothness from band to band, octave to
octave. For competition, a perfect system would have the same amplitude over the entire audible range. Listed are
different types of frequency response problems and what course of action should be taken either with the DEQ 30
or other system adjustments or modifications.
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27
25Hz
31.5Hz
40Hz
50Hz
63Hz
80Hz
100Hz
125Hz
160Hz
200Hz
250Hz
1000Hz
1250Hz
1600Hz
2000Hz
2500Hz
3150Hz
4000Hz
5000Hz
6300Hz
8000Hz
10000Hz
12500Hz
16000Hz
20000Hz
315Hz
400Hz
500Hz
630Hz
800Hz