LA Audio EQ231G - Manual (Page 5)

EQ231G User Manual 5
Should the power on the unit fail the unit automatically switches into bypass through a
delay circuit.
The switched Hi-pass filter on the EQ231G is a 2nd order (12dB/octave) with the corner
frequency fixed at 35Hz.
4.2. System check
(Refer to the installation section before applying power)
Set the controls as follows :
ALL faders to the central position. (0dB)
Master Level Controls to 0dB.
Hi-pass filter switched out
Apply program material to each channel and observe there is no change when the EQ
bypass switch is toggled.
Put the EQ in (LED ON) and activate each fader to ascertain that each filter is working.
(The program material should cover the entire audio range, otherwise the filters may
appear inactive).
5. Applications
A graphic equaliser may be used in many situations and in many different ways. It is
impossible to document every implementation, but we hope that the following examples
will serve as a useful "starting point".
5.1. Some examples
a) Room equalisation
Every room, whether it be a home, a studio or a theatre has a different acoustic
response, depending upon furniture, types of wall, ceiling and floor covering, types of air-
conditioning etc. In conjunction with an audio analyser, a graphic equaliser may be used
to "correct" the room. i.e. tailor the sound being reproduced so that the room appears to
have an even or "flat" response throughout the audio range of frequencies, thus
providing a correct reproduction of the original sound.
b) Sound-shaping or tailoring
The graphic equaliser may be used to change an original sound to make it more
pleasing to the ear or to blend it in with other audio signals without overlap. This
technique is quite common in recording or production studios to tailor a sound for its
eventual reproduction medium.