User manual VELODYNE DD-18PLUS QUICK GUIDE

[. . . ] Unpack the system carefully and use the following guidelines in order to find the best room placement option. True subwoofers operate at extremely low frequencies which are primarily omni-directional. Keep in mind that frequency response and output level can be drastically influenced by placement, depending on the acoustic properties of the listening room. To obtain optimum output from your subwoofer, try placing it within a foot of a corner. [. . . ] If the subwoofer's signal comes from the LFE channel of your receiver, use a "Y" splitter to connect to both the left and right inputs. If using line * level connections from a preamp or signal processor, use both Left and Right inputs from your preprocessor or preamp and connect them to the Left and Right inputs on your subwoofer. (See figure 2a on page 7. ) * This dual male-to-female "Y" splitter can be found at your local electronics store. 2) If using a receiver with LFE out, be sure the LFE channel is sending adequate signal to the subwoofer. We recommend setting the subwoofer's level to the 9 o'clock position (the 1/4 volume setting) and then adjust the LFE channel on your receiver or processor to achieve the desired bass output. See your receiver or processor's owner's manual for more information. (See figure 2b on page 8. ) The SPEAKER LEVEL jacks connect directly to the speaker outputs of any amplifier, integrated amplifier, or receiver. Your amplifier section will notice no additional loading effects when you use these inputs due to their very high impedance. If using the SPEAKER LEVEL inputs, you DO want to connect both channels, since different bass information might be present in each channel going to your main speakers. Important!!! Do not use both LINE LEVEL and SPEAKER LEVEL connections simultaneously!To avoid damage to your main amplifier, be sure to maintain correct polarity when making all connections - red (positive) to red, and black (negative) to black. Be sure all connections are tight, and that there are no loose strands or frayed wires. Volume Contr ol This control allows you to balance the output from the subwoofer to the main speakers in your system. PHASE switch - Select the switch position at which you hear a louder mid-bass sound. Impact Series User's Manual (3) . (4) www. velodyne. com 5 (5) VOLUME LEVEL knob - Use this knob to adjust the output level of the subwoofer. LOW-PASS CROSSOVER - Use this knob to select the high-frequency range at which you wish to cut-off the signal to the subwoofer. (automatically turns to STANDBY mode if no signal for eight minutes) (6) (7) C ro s s ov e rs Receiver/Processor Subwoofer Outputs The Velodyne subwoofer is designed to operate using the full range audio signal for input when using the built-in crossover. Many home theater processors/receivers (Dolby DigitalTM, DTSTM, THXTM) have a "subwoofer out" jack (sometimes labeled "LFE") that is internally filtered, settable at the receiver/processor, and designed to be used with a powered subwoofer. In some installations, it may be beneficial to use BOTH the Velodyne crossover and the receiver/processor crossover, resulting in a steeper ultimate crossover slope. In some rare cases, combining both an external crossover and the one internal to the subwoofer may result in low output and increased noise. In these installations you may need to bypass the crossover in either the processor or your Impact subwoofer, or simply setting one crossover to a higher frequency (such as 120 Hz) will restore maximum performance. (Refer to Figure 2a Line-Level Subwoofer Connection Diagram and Figure 2b Speaker-Level Subwoofer Connection Diagram, pages 7 and 8 for connection diagrams. ) . www. velodyne. com Impact Series User's Manual 6 FRONT REAR SUBWOOFER OUTPUT JACK AMPLIFIER Figure 2a. Line-Level Subwoofer Connection Diagram . www. velodyne. com Impact Series User's Manual 7 REAR FRONT SUBWOOFER OUTPUT JACK AMPLIFIER FRONT LEFT SPEAKER FRONT RIGHT SPEAKER . Figure 2b. Speaker-Level Subwoofer Connection Diagram www. velodyne. com Impact Series User's Manual 8 Interconnect Cables When installing your new Velodyne subwoofer using the line level connections, you should always use shielded phono cables. It is recommended that you keep the length of cable as short as possible to avoid any potential noise problems. [. . . ] ("VELODYNE") warrants all electronics for a period of three years, drivers for a period of five years, and full range speakers for a period of five years. All VELODYNE products have a warranty from the date of purchase against defects in materials and workmanship subject to the following conditions: 1. VELODYNE is not responsible for defects which result from the use of an amplifier or controller other than the one originally supplied with the unit (subwoofer) or defects which result from modifications or repairs made by any component of the system by anyone other than a VELODYNE factory authorized service representative. This warranty is void if any repairs or service covered by the terms of this warranty are made to any component of the system by anyone other than a VELODYNE factory authorized service representative. [. . . ]