User manual VELODYNE VA 907

[. . . ] Retain Instructions -- The safety and operating instructions should be retained for future reference. 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. [. . . ] This system represents the state of the art in accurate low frequency reproduction. Read and follow the instructions below to insure safe and proper system operation. 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 observe all warnings on the equipment itself. There are no user serviceable parts inside. Please refer all service questions to your authorized Velodyne dealer. Prior to installation Please unpack the system carefully. Remove all staples used to seal the carton as they can scratch the cabinet. Please save the carton and all packaging materials for future use. 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. Following is a simple troubleshooting guide to assist you. 1. 5. Verify unit is plugged in and power outlet used is active. Is unit receiving an input signal from your source?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. [. . . ] 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. If this is the case, you should set the low pass crossover to 150Hz. Note If not using an external crossover, you should use the built-in crossover for optimal performance. Subwoofer out from A/V Processor From the low pass output of your signal processor Install into right or left RCA line in connector in the back of the subwoofer or use a "Y" connector adapter into both right and left RCA line in connectors in the back of the subwoofer. Figure 1: Installation using line-level (line in) inputs VOLUME PHASE FREQUENCY Speaker-level connection Figure 2 shows an easy way to connect your VA-806/907 subwoofer directly to your receiver or integrated amplifier. CAUTION! WARNING: AVIS: When connected in this fashion, your satellite speakers will be crossed over at 85hz, which removes the lower bass from your speakers thus, enabling them to do a better job reproducing high frequencies. [. . . ]