User manual DUAL L12SW

[. . . ] Do not attempt an installation that would elevate the subwoofer above floor level. You should experiment with various placements. Room Acoustics can produce large apparent differences in the sound for small changes in the placement location and adjustments to subwoofer controls. For Example, directing the woofer of a forward firing sub toward one's typical listening position and adjusting the low pass filter to 150 Hz can make the sub very directional. [. . . ] This control helps you adjust the system's low frequency balance to blend your subwoofer with the other speakers within your system. An example: If you adjust the control to the subwoofers low 50 Hz setting, the filter limits frequencies above that from being reproduced or heard from the subwoofer. Power Indicator LED Power Switch Fuse Speaker-In Terminals Low Pass Frequency (LPF) Control 4 SUBWOOFER SERIES INSTALLATION Connecting Speakers Low Pass Frequency (LPF) Control (cont'd) This can be a desired setting if you are using the sub in combination with tower or floor-standing speakers. If you are using satellites speakers with 5. 25" cones sizes or under, you will want to move the frequency up to slightly overlap the lowest frequency the satellites can produce. If your satellite frequency response is rated at 80 Hz to 18 kHz then you may choose to move the LPF control higher to blend the highest frequency of the subwoofer slightly past the lowest frequency of the satellites. In this example you may wish to set your sub's LPF control to 90 Hz creating a mid bass coupling between your sub and the rest of your speaker system. Balances the loudness of the Subwoofer relative to the Front speakers and compensates for room effects on the Subwoofer's output. It should not be necessary to set the level control to maximum volume to achieve a well balanced installation, but you may need to adjust when changing between music CD's and DVDs. Important: Use Option1 or Option 2, but not both. Connection with speaker wire - Connect speaker wires from the Receiver's front left and right speaker outputs to the Subwoofer's Speaker Level-In connections. Connect left channel to left input and right channel to right input. You have the option of connecting your main speakers to the speaker B outputs on your receiver if it is so equipped; otherwise, you have the option of connecting your main speakers using the connections on the Subwoofer. This will send the audio signal to the main speakers while funneling the low bass frequencies to the subwoofer. To take advantage of this option, connect your main speakers to the right and left outputs on the Subwoofer. Be sure you take care to maintain proper signal polarity by connecting the red wire to the red terminal, and black wire to the black terminal. Connection with audio cable - This connection employs a left/right audio cable. To use this option, your receiver should include a subwoofer Out jack, which is typical of receivers equipped with Dolby Digital and DTS 5. 1 decoding. Locate the subwoofer output jack on the back of your receiver. Using a standard audio cable, connect the subwoofer output onthe back of your receiver to the line-In on the back of the subwoofer. The line-out feature can be used if you choose to install an additional subwoofer to your system. The line-out would be connected to the line-in of the second subwoofer. 5 Level Control Note: Dual recommends you use 16-gauge speaker wire for Opinion 1 when hooking your Receiver speaker outputs in making an audio connection to your Subwoofer. SUBWOOFER SERIES TROUBLESHOOTING Troubleshooting Distortion/Knocking If you believe you hear obvious distortion or knocking sounds, immediately lower the volume level of your receiver. Those sounds often indicate that either the receiver or the subwoofer is being over driven and damage can result in playing CD's and DVD's at high volumes. You should avoid turning the bass or treble to maximum levels, and refrain from using the Loudness button when the volume level is high. [. . . ] This warranty is extended to the original retail purchaser for products purchased and used in the U. S. A. , in the 48 contiguous states ONLY. This warranty covers all defects in material and workmanship in this product. The following are not covered: installation/ removal costs, damage resulting from accident, misuse, abuse, neglect, product modification, improper installation, incorrect line voltage, unauthorized repair or failure to follow instructions supplied with the product, or damage occurring during return shipment of the product. If the product requires warranty service, you must prepay the initial shipping charges. [. . . ]