XTZ Atmosphere S2, Owner'S Manual

Page: 9 / 16

9
Calibration
Introduction
For optimal performance, you should calibrate your system to ensure proper level matching between
all speakers and the proper setting of all controls (including crossover frequency, phase, and any
channel delays your receiver/processor may offer). This procedure will vary depending on system
configuration and the information below is provided as a basic guide to assist you. Refer to the owner’s
manual for your receiver/processor for information on performing the steps required to enter their
setup mode and adjust any applicable settings.
After all connections have been made, turn on the AC power to your system, starting with the first piece
of source equipment in the signal chain (such as a CD or DVD player), then power on any dedicated
equalizer, then power on your receiver/processor/amplifier(s), and last but not least, power on the
subwoofer. You will need to enter your receiver’s/processor’s setup mode and adjust any applicable
speaker settings to properly match your system configuration
Receiver/Processor
With Automated Setup &
Calibration Function
After you have verified all speakers are connected and you have measured distances of each to the listening
position, perform the auto-setup routine on your receiver/processor (if available). Many newer home
theater receivers/processors combine a measurement microphone and an automated setup routine to
assist you with proper setting of speaker levels, crossover frequency, speaker delay and phase. Consult
the owner’s manual for your receiver/processor for further instructions on how to perform the setup
routine. After the auto-setup routine is complete, verify the final settings the receiver/processor selected
to ensure there are no erroneous settings (e.g. the settings should match your system configuration).
Some settings to verify may include:
- Number of speakers (e.g. 7.1 or 5.1 system, etc.)
- Type/size of speakers (e.g. small or large front/surround and subwoofer set to yes/on)
- Crossover point should be similar for identical speakers (e.g. if your system using 3 of the same-
speakers for all front channels, verify the receiver/processor selected the same crossover point
for all these channels)
- Crossover frequency should be selected. We recommend 80Hz for the M6 to start. Slighly higher
or lower xover point may yield better results in your system.
- Note: some receivers do not have an adjustable frequency, instead there is only a choice of
“small” or “large”. In this case, we recommed choosing “small”.
- Gain settings for each channel should be reasonably close (e.g. if the speakers are placed at even
distances, the gain setting for each channel should typically be within a couple dB from channel to
channel). If the receiver/processor gain trim setting for the subwoofer channel is a large value (e.g.
+12 or -12dB) you may need to increase the subwoofer’s gain to achieve a better match
- Low subwoofer gain/trim settings (on your receiver/processor) effect the operation of the “AUTO
ON/OFF” signal sensing circuit. If your receiver/processor gain is set to a low values (e.g. attenuat-
ing the signal -6dB or more) this reduces the signal available to properly “turn on” the subwoofer
when using the “AUTO ON/OFF” feature. If your subwoofer turns off unexpectedly when watching
movies at low volumes, you may wish to increase the receiver’s/processor’s subwoofer gain
trim, and manually reduce the volume using the subwoofer’s “BASS LEVEL” control to maintain
proper balance.
- Polarity/phase; This should be adjusted for smoothest frequency response near the xover point.
- EQ settings; if your receiver/processor allows you to see the eq settings for each channel, verify
that it is not adding any extra “limiter”, or “HPF” to the subwoofer channel, and that it is not adding a
high level of boost (e.g. >+3dB) or cut (e.g. -10db).
NOTE:
In some installations, automated room eq algorithms may make undesired changes to the subwoofer
signal settings trying to obtain what they believe is the best room response curve. In some systems
these changes have been known to degrade the overall sound quality of the subwoofer. If using a
receiver/processor with automated room eq function, we advise you listen to the system first with the
eq disabled, then again with the eq enabled, to determine if the changes are beneficial.