User manual VELODYNE VA 907

[. . . ] Heed Warnings -- All warnings on the subwoofer and in the operating instructions should be adhered to. Follow Instructions -- All operating and use instructions should be followed. Water and Moisture -- The subwoofer should not be used near water -- for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, near a swimming pool or the like. [. . . ] To prevent fire or shock hazard, do not expose this equipment to rain or moisture. To avoid electrical shock, do not open speaker enclosure or amp chassis cover. Please refer all service questions to your authorized Velodyne dealer. Remove all staples used to seal the carton as they can scratch the cabinet. Record the serial number in the space provided on the warranty card for future reference. Troubleshooting & Service Before seeking service for your VA-806/907 subwoofer, please recheck all systems. Have all controls on subwoofer (volume, crossover, phase, etc. ) been properly set? Product Features & Controls The following conditions require service by a qualified technician: q Built in power amplifier q Adjustable (50 to 150hz) low-pass crossover q 85hz high-pass crossover q Line-level inputs & outputs q Speaker-level inputs & outputs with spring clips q Signal sensing auto turn on/off with bypass option q Variable volume control q selectable phase control (0 or 180 degrees) q Magnetically shielded for video use 1. The unit does not appear to operate normally or exhibits a marked change in performance. Some part of the cabinet or circuitry is physically damaged. Thank you for purchasing a Velodyne! continued. . 9 2 Installation Your new VA-806/907 subwoofer system provides for a number of installation options. Read all the installation information below in order to determine which installation option is best for your system. Remember to perform all installation procedures with system power turned off. When using a pair of VA-806/907 subwoofers in stereo, it is preferable to place each subwoofer adjacent to the satellite of the same channel. Keep in mind that frequency response and output level can be drastically influenced by placement depending on the acoustic properties of the listening room. Typically the VA-806/709 will sound louder when placed next to a wall or in a corner. Do not place the cabinet next to sources of heat such as furnace registers, radiators, etc. The power cord should be routed in such a way that it will not be walked on, pinched, or compressed in any way. Regardless of where you install your VA-806/907 subwoofer, it must remain in an upright position (passive radiator facing downward). [. . . ] If your main speakers are smaller units with limited low frequency output, you may wish to choose a higher frequency (such as 100-120hz) than you would with larger speakers which have greater low frequency output. With larger speakers, you might start with this control set lower, such as 80hz. VOLUME FREQUENCY CAUTION! WARNING: AVIS: +R - - L + MAIN OUTPUTS (speaker-level) Phase adjustment This control allows you the ability to compensate for having the subwoofer in a different location than the main speakers. Ideally, you will have the sound from the subwoofer reach the listening position the same time as the sound from the main speakers. [. . . ]