M&K Sound Professional Powered Subwoofer Operation Manual - page 14
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8. Channel Calibration
Take the measurement at the listening position to establish the reference level. Set all channels to exactly the same level
(usually 75 dB for home theater systems.)
Use a Sound Level Meter either analogue or digital. Point it directly at the speaker being measured. Set all channels to the
same level, using your receiver or processor’s internal test signal.
All major receivers / processors are today equipped with high quality measurement systems, as well as microphones. This
can also be used in order to make the final audio calibration of your system.
And a final recommendation is to use your own judgment “Your Ears”.
9. Check phase for the five main channel speakers are wired correctly in phase.
10. Make sure that the subwoofer and main speakers are in phase at the 80 Hz crossover point.
Listen to something with a consistent bass line around 80 Hz while a partner rotates the “Phase” control on the Subwoofer
from “+” to “-” The position that results in the greatest bass at the listening position is the correct setting.
11. Play something that is familiar to you through the system to verify the system’s overall performance.
If something does not sound right, recheck your connections and settings.
12. Switch the processor/receiver to each input that you will use.
Check your settings for each input and each mode, some processor/receivers require that you enter settings separately for
each mode and/or input.
13. Before playing the system check levels and speaker alignment one last time.
Make sure that you write down all processor settings for future reference.