Advanced Equalization

PERFECTLY FLAT CURVE

25Hz

31.5Hz

40Hz

50Hz

63Hz

80Hz

100Hz

125Hz

160Hz

200Hz

250Hz

315Hz

400Hz

500Hz

630Hz

800Hz

1000Hz

1250Hz

1600Hz

2000Hz

2500Hz

3150Hz

4000Hz

5000Hz

6300Hz

8000Hz

10000Hz

12500Hz

16000Hz

20000Hz

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.