PRELIMINARY
miniDSP Ltd, Hong Kong /
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33
4.10.3
Dual subwoofers
To use two or more subwoofers, use the Mixer tab to route the signal to two or more channels. This is illustrated
overlaid on the signal flow diagram from Figure 5 (this is a partial signal flow illustrating just the subwoofer):
It is important to note that there is only one Dirac Live channel for all the subs. This way, Dirac Live can correct
for the effects of
all
subwoofers playing at the same time. If you use the Routing tab for splitting the subwoofer
signal and use multiple Dirac Live channels, then when they are all combined, the result may not be as good.
This example shows the Mixer tab for the above example:
You can perform optimizations on the individual subwoofers on the output channels
before
running Dirac Live
calibration. Changing the delay between the subs can improve the response, either by removing a null or by
reducing the variation between seats. See this app note for some ideas on how to tune with multiple subs (it
was written for a room, but Methods B and C will apply in a vehicle):
•
Tuning multiple subwoofers with miniDSP
