Genelec Loudspeaker Manager (GLM) 4 - System Operating Manual
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7.15.2 Reviewing the AutoCal result
After the AutoCal measurement and calculation process has completed, you can review and
evaluate the resulting frequency response compensations. Click on each monitor and subwoofer to
review the measurements (red curve), corrections (blue curve), and compensated (green curve)
responses in the graph window.
Note that for standard stereo setups placed in a symmetrical manner (equilateral triangle), it often
makes sense to manually set to ‘0’ the values for the time-of-flight correction and the level
adjustments. Usually, some small correction values appear simply because the measurement
microphone is not perfectly and accurately positioned in relation to each monitor. In such cases,
deleting such small correction values can improve the stereo imaging and its stability.
Figure 33. Reviewing the corrections by clicking on the monitor and subwoofer icons
7.16 Advanced use of AutoPhase
AutoPhase uses the selected Bass Management Filter frequency setting together with the selected
monitor. The purpose of AutoPhase is to align the subwoofer phase with the reference monitor so
that the frequency response across the bass management crossover is flat.
7.16.1 Acoustical reasons for selecting the crossover frequency
Select a crossover frequency for the group that makes acoustical sense. A good crossover
frequency is one that shows good output from at least the subwoofer and the reference monitor.
Even better is when there is sufficient output from all monitors at the crossover frequency. The
output is sufficient when the level in the equalized frequency response is similar to the midrange
level and there is no notch in the frequency response close to the crossover frequency.
