P. 9
- AUDIOLAB EQ-2231
English version
7. OPERATION AND APPLICATION NOTES
8. TECHNICAL SUPPORT/FACTORY SERVICE
The EQ-2231 Graphic Equalizers are useful audio
signal processing tools in situations where precise
frequency control is required across the audible
frequency spectrum.
When used with an audio spectrum analyzer the
EQ-2231 can tune any acoustical environment
-- from the studio to the concert hall -- to stop
ringing, increase clarity, and flatten the overall fre
-
quency response of the environment. A real-time
spectrum analyzer or other types of audio envi-
ronment analyzers are very useful in determining
the amount of equalization needed.
Insert the graphic equalizer between the signal
source (usually a mixer) and the power amplifiers
(or the crossover if there is one). Adjust the level
and equalization as required to yield the desired
system response. The long throw faders of the
EQs allow very precise settings of the equalization
for accurate equalization curves.
For optimum signal-to-noise response, the gain
structure of the sound system must be proper-
ly set up. Each component of the sound system
should be set at its nominal operating level, start-
The EQ-2231 is all solid-state products with
components chosen for high performance and
excellent reliability. Each unit has been tested and
burned-in at the factory. No adjustment of any
type should be required throughout the life of the
unit.
ing with the first element in the system, usually
a mixing console. Each element should be run at
its nominal operating level in order to take ad-
vantage of the maximum signal-to-noise proper-
ties of that element. Loudspeaker amplifiers, as
the last element in the chain, should be set only
as loud as necessary, in order to avoid inducing
unnecessary noise into the system.
All active equalizers, by nature of design, add
noise when boosting or cutting that can easily
degrade the otherwise acceptable signal-to-
noise ratio of a sound system. Drastic equal-
ization can result in a loss of 20dB or more
signaltonoise. EQ Type III'" Noise Reduction was
engineered specifically for applications such as
this. It provides up to 20dB of noise reduction,
thus restoring the dynamic range necessary for
even the most demanding professional sound
systems. The combination of proper wiring,
proper gain structure and TYPE III' Noise Reduc-
tion should render your sound system virtually
noise free.
If circumstances arise which necessitate repair,
we recommend that your EQ-2231 be returned
to the factory. This can only be done by receiving
a RETURN AUTHORIZATION number from EQ
customer service.
