Bose Acoustimass 15 Series II Owner's guide - Page 13

Using your system For realistic home theater sound CAUTION: The Acoustimass® 15 Series II and Acoustimass 16 speaker systems incorporate 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. Adjusting the LFE level The LFE (low-frequency effects) level control on your powered Acoustimass module increases or decreases the relative level of low-frequency effects on movie sound tracks. Use it to regulate the presence of these underlying deep bass sounds. Use the "test tones" feature in your digital surround sound receiver to match the volume levels for each of the cube speakers. Then use the LFE control on the Acoustimass module to match the volume of the LFE channel to the cube speaker channels. Adjusting the bass/room compensation level This feature will allow you to fine-tune your system after you have placed the Acoustimass module in your selected location. If the room sounds "thin" or lacks bass, turn the BASS control in a clockwise direction to increase the bass level of the module. If the room sounds "boomy" or has too much bass, turn the knob in a counter-clockwise rotation to reduce the bass level of the module. The factory or detent setting is appropriate for a majority of listening situations. Setting your digital surround sound receiver Your Acoustimass 16 or Acoustimass 15 Series II speakers are fully compatible with the output from digital surround receivers. Integrated Signal Processing assures full bass reproduction for all channels regardless of receiver settings. However, the following table suggests a set of recommended receiver settings. The cube speaker arrays should be set to LARGE in the receiver's digital display menu. The LFE, or subwoofer, is set to ON. If applicable, the crossover value should be set to the lowest number possible, typically 80 Hz. Speaker Receiver setting Left and right LARGE Center LARGE Left and right surround LARGE Center surround* LARGE LFE/Subwoofer ON * Applies to Acoustimass 16 systems or upgraded Acoustimass 15 Series II systems. For upgrade information, see "Upgrading your Acoustimass 15 Series II speaker system" on page 12. 13 AM264924_00 _V.pdf • August 13, 2002