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10 October 22, 2001 AM194452_06_V.pdf
Using Your Acoustimass
®
15 Speakers
For realistic home theater sound
LFE level control
The LFE level control on your Powered Acoustimass module increases or decreases the
relative level of low frequency effects on movie soundtracks. Use it to regulate the presence
of these underlying deep bass sounds. You may find it unnecessary to adjust this control. The
factory, or detent setting is appropriate for a majority of listening situations.
Bass control
The Bass control on your Powered Acoustimass module can help you customize your
listening room. Turning the control to the right will add bass to the sound in rooms that might
be characterized as too shrill. Turning down the control will “brighten” the listening room. As
with the LFE level control, you may find the factory setting to be completely appropriate for
your listening room.
Setting your Dolby Pro-Logic receiver
For video applications, we recommend the surround-sound center mode setting of your
receiver as WIDE (Figure 8). Instructions for this process vary, depending on the brand and
model of receiver you are using. Follow your receiver owner’s guide for testing and adjusting
the balance of each speaker.
Figure 8
A Dolby Pro-Logic receiver with
the center mode set to WIDE
Setting your Dolby Digital receiver
Your Acoustimass 15 speakers are fully compatible with the output from Dolby Digital receiv-
ers. Integrated Signal Processing assures full bass reproduction for all channels regardless of
receiver settings. However, the table below suggests a set of recommended receiver settings.
The cube speakers are full-range, or LARGE speakers on the Digital screen menu. Turn the
subwoofer and the LFE (low frequency effects) ON. Set the crossover to the lowest number
possible, typically 80 Hz.
Speaker Setting at receiver
Left and Right Front Large
Center Large
Left and Right Surround Large
Subwoofer ON
LFE (low frequency effects) ON (at maximum setting)
Note:
The Acoustimass 15 speaker system incorporates an automatic protection circuit,
which guards against most kinds of damage from electrical stress or overload. This circuit
activates at high volume levels to reduce output, causing a slight decrease in volume. This is
normal operation and indicates that power input may be exceeding safe levels. Sustained
listening at these levels is not recommended.