User manual VELODYNE DD-18 DATASHEET

[. . . ] THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. THE EXCLAMATION POINT SYMBOL is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the subwoofer. 1. READ INSTRUCTIONS -- All safety and operating instructions should be read before the product is operated. RETAIN INSTRUCTIONS -- The safety and operating instructions should be retained for future reference. [. . . ] The ACTIVE light should be yellow. W iConnect User's Manual After 12 minutes without receiving a signal, the ACTIVE light turns red to indicate STAND BY mode. The subwoofer will automatically go from STAND BY mode to ACTIVE when it detects an audio signal. Play some music through your receiver. W iConnect User's Manual 2. Turn the subwoofer's VOLUME to a level that balances with the output volume of your satellite speakers and doesn't distort the bass sounds. You might also want to adjust your receiver's LFE output volume higher, if you can't get a loud enough subwoofer output, or lower, if the subwoofer output is too loud. If you didn't use the LFE INPUT on the wireless transmitter, optionally, adjust the subwoofer's LOW PASS FREQUENCY to provide a wireless transmitter input equivalent to an LFE input. The LOW PASS FREQUENCY is the frequency at which the subwoofer's output starts to decrease as the frequency increases. Your satellite speakers output the frequencies not covered by the subwoofer. You want to not be able to hear the transition from the subwoofer output to your satellite speakers' output. If your satellite speakers are small with limited low frequency output, choose a LOW PASS FREQUENCY of between 100 Hz and 120 Hz. If your satellite speakers are larger with better low frequency output, choose a LOW PASS FREQUENCY of around 80 Hz. Follow the instructions in the Select Wireless Broadcast Channel section. Follow the instructions in the Adjust Subwoofer Controls section for each subwoofer. Usually, this setup uses one subwoofer for the R audio channel and one subwoofer for the L audio channel. If using separate R and L channel subwoofers, place each subwoofer within a couple of feet of the appropriate main speaker for the channel. If the system's crossover frequency is high, each subwoofer should be even closer to its channel's main speaker. Connect a wireless transmitter to each signal you want to transmit to a subwoofer. Follow instructions for SETUP #2 in the Connect Wireless Transmitter Section, except pair one transmitter's R input to the R channel receiver output and the other transmitter's L channel input to the L channel receiver output. Follow the instructions for OPTION #3 in the Select Receiver Options for Optimal Subwoofer Performance section. Follow the instructions in the Select Wireless Broadcast Channel section, except: a. Select a unique wireless broadcast channel for each wireless transmitter. Match the wireless broadcast channel on each subwoofer to that of the wireless transmitter that broadcasts the audio signal the subwoofer is to output. [. . . ] If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: · Reorient or relocate the receiving antenna. · Increase the separation between the equipment and the receiver. · Connect the equipment into an outlet different from that to which the receiver is connected. · Consult the dealer or an experienced radio/TV technician for help. [. . . ]