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EQUALIZATION PROCESS
Always begin the equalization process with all sliders at their center-detent (flat response) positions.
For units equipped with FLS
®
, increase system volume until slight feedback occurs. Note the LED(s)
that illuminate, and lower the corresponding fader(s) until feedback is eliminated. In other words, see
the light pull down the fader. For the Q 215B, lower each fader until the feedback frequency is
found. Lower the faders in small amounts to avoid adversely affecting sound quality. Likewise,
excessive boosting of a frequency may result in feedback.
EXERCISE CAUTION WHEN ATTEMPTING TO BOOST FREQUENCIES BELOW SPEAKER
SYSTEM TRANSDUCER CUT-OFF.
Typical sound reinforcement enclosures are not designed for 20 Hz performance, and transducer
damage could result from “over-boosting” low frequencies. Excessive boost at very low frequencies
could also limit overall system headroom. Engaging the 40 Hz low-cut filter is the best way to avoid
these problems.
NOTE: Superb tonality, absence of feedback, and great-sounding systems may not be possible with
any graphic equalizer. All other system components must be of high quality and designed for the
application. No amount of equalization will correct an acoustically bad room, bad
microphone/speaker arrangement, or completely correct the response curve of a poor loudspeaker.
FEATURES AND CONTROLS
FRONT PANEL
(1) OUTPUT LEVEL LED METER
This LED array indicates output level from –12 dB to +12 dB.
(2) GAIN
This calibrated, detented control regulates overall gain of the EQUALIZER SECTION (3).
Unity gain throughout the signal chain can be maintained by recovering lost signal gain at this
point. The equalization process may result in noticeable signal loss. To compensate for this
loss, engage the BYPASS (5) switch and compare the signal level with that of the equalized
level. Increase the GAIN control until the equalized level approximates that of the bypassed
level. Let your ears be your guide.
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