Quested SB10 User Manual - page 12
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A final alignment should be executed when the exact position of the monitoring has been
determined and any furniture, soft furnishings and/or carpet are in place. To carry out an
accurate alignment it is necessary to use professional test equipment, a real time spectrum
analyzer would be the best option for most users. A spectrum analyzer (AL1), signal source
(MR1), signal switching box (SB1) and measurement microphone (ML1) can be obtained
from selected Quested distributors.
Accurate system alignment: Place the measurement microphone at the listening position,
Facing it forward. This is a point at ear height in the central listening position, see fig 1 or 2
on page 10. Correct mic placement is critical to achieve reliable results. Connect the
microphone via an XLR cable to the analyzer (AL1). Connect the
signal source (MR1) to the left and right inputs of the SB Controller via the switching box
(SB1). The analyzer needs to be easily visible whilst the SB10 Controller and signal source
are adjusted.
The AL1: Turn the unit on, select setup 1, which will display SPL/RTA. At the top right
hand
corner of the screen set the full scale spl level to 105. Set the weighting, which is just to the
right of top/center of the screen to FLAT. Set the display to RTA which is just to the left of
the top/ center
AL1
This is the AL1 display set up correctly
The MR1: Turn the unit on, select signal:P.Noise, set the amplitude to A
moderate level between - 24 and —14 dBu.
Before you attempt to align the system, familiarize yourself with the controls on the front of
the SB10 Controller and the effects that they have. By switching the bypass control you will
be able to compare the unfiltered response of your monitor system with out the contribution
of the SB10 to that of the combination. Switch off the main speakers to listen to the effect
that adjusting the crossover frequency control has on the response of the SB10.
If there are any large dips or peaks in the response, the SB10 cabinet can be repositioned to
minimize them.
Now that you are familiar with the units send the pink noise to the left speaker, adjust the
level on the SB10 Controller to obtain the flattest response on the analyzer.
Display showing 1 S6
Display showing 1 S6
Display showing 1 S6
With the sub bypassed
and 1 SB10 Bass to high
and 1 SB10 with flat response