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T66 Owner's Manual
Adjusting the Subwoofer Level Control
Your T66 speakers have a Subwoofer Level control which allows you to perfectly tune the output of the
powered low-frequency subwoofer section to match your room, and your own personal taste. We suggest
beginning with the level control set at the 12 o'clock position. Please note there is no adjustment of the crossover
points or phase because these have already been designed and engineered into the speaker for the best
possible overall system response — a major performance benefit of having the "built-in" subwoofer.
VERY IMPORTANT: Setting Channel Levels and Bass Management Systems
Multi-channel surround sound systems have a critical channel balancing procedure for setting the level for all
speakers which must be followed if the system is to perform properly. Many problems relating to the overall sound
of the system can be clearly traced back to improper system balance. Also note that multi-channel surround
sound systems have bass management systems (systems which direct the bass to the various channels) which
vary from unit to unit. This bass management system must also be properly adjusted. Many problems relating to
the overall sound of the system can be traced back to improper bass management.
Bass Management Settings:
On your receiver or A/V processor's Speaker Setup Menu, set Left and Right main speakers to "Large" and
set Subwoofer to "Yes" or "No" depending on whether you are using the additional LFE input (as discussed
in Speaker Connection section). If you are using the T66 speakers for surround speakers, set the surround
channels of your receiver/processor's bass management system to "Large" also.
Setting Channel Levels
On your AV receiver or processor's Speaker Level Calibration Menu, set each speaker (channel) in the system
to the same volume level. While you can get reasonable results doing this by ear, it is best to use an inexpensive
Sound Pressure Level (SPL) meter to get better channel-to-channel balance. Some new receivers and processors
have Auto Set Up functions that use a supplied microphone to set levels automatically.
Adjusting Low-Frequency Balance When Using LFE Input
When using the LFE input we suggest adjusting the Subwoofer Level on the T66s to sound balanced when
listening to music, and using the LFE or subwoofer level control in the AV receiver/processor to raise or lower the
bass/LFE level for movie/surround sound effects as desired. Normally the Subwoofer Level of the left speaker will
be set the same as the right speaker. However, these Levels can also be set differently on the two speakers to
vary the response of left and right speakers separately to compensate for variations such as asymmetrical
positioning of the speakers in your room (i.e., when one speaker is closer to a side wall or corner, etc.) if this is
how they best fit in your room. This is a unique and useful feature of the T66 design which allows much greater
flexibility in loudspeaker placement, as well as additional ability to optimize what could otherwise be a difficult
placement situation.
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