User manual VELODYNE FSR-15 REV D

[. . . ] Please observe the following instructions to insure safe and proper system operation. Note: Do not leave unit in direct sunlight or use in high humidity environments!!!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. [. . . ] The crossover control allows you to adjust the upper limit of the subwoofer's frequency response from 40 to 120 Hz. The subwoofer's response will begin rolling off above the frequency you set this control to. You should set the crossover frequency to obtain a smooth and seamless transition from the subwoofer to the main speakers in your system. If your main speakers are smaller units with limited low frequency output, you may wish to choose a higher frequency (such as 100 -120 Hz) 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 80 Hz. A bypass switch is also provided if you wish to use an external crossover. If you are not using an external crossover, we recommend that you use the one provided within the unit for optimum performance! Phase Adjustment - 0°/180° This control allows you to "reverse" the phase of the subwoofer's output signal 180° to correct for any possible mismatch and resulting cancellation between the subwoofer and your main speakers/amplifier. To adjust, simply listen to the system with music playing. Then move the switch from one position to the other and listen for a change in mid-bass frequency output. The correct position will have a greater amount of apparent mid-bass frequency output. . www. velodyne. com VMS User's Manual 3 Crossover Switch - INTERNAL X-OVER/SUBWOOFER DIRECT This switch allows the internal crossover circuitry to be removed from the signal path. This is required in certain installations which route the signal through external processors with a crossover circuit of their own, such as the new digital units. When using a single channel input (such as a surround sound processor's subwoofer out or LFE), the auto on/off circuit sensitivity will be affected. When one input channel is used instead of two, the unit will see lower signal levels present at the inputs. This may cause the unit to turn off when listening at low volume levels. If this occurs, simply use a "Y" adapter (available from most dealers) to allow your processor's single sub line to be fed into both L&R inputs. This will make the unit turn on at lower signal levels. www. velodyne. com VMS User's Manual 5 Line-Level Connection - Option B Figure 2 shows connection from a pre-amplifier's main outputs to the left and right inputs of your Velodyne subwoofer. You will also need to connect a second pair of RCA cables from the outputs on the back of your subwoofer to the inputs on the back of your amplifier. When the subwoofer is installed in this fashion, your satellite speakers will be crossed over at 80 Hz which removes the lower bass frequencies from your external amplifier and speakers, enabling them to do a better job reproducing the higher frequencies. By utilizing this method, you will have a bi-amplified system, gaining improved power and headroom for your system. This installation method is not as common as the method described in Figure 1. (Cables needed: 2 stereo pair of RCA cables. ) . Figure 2. Installation Using Stereo Line-Level Inputs VMS User's Manual www. velodyne. com 6 Speaker-Level Connections Figure 3 shows an easy way to connect your Velodyne subwoofer directly to your receiver or integrated amplifier, if it lacks line-level outputs. [. . . ] If the unit has been running at high levels, one of the protection circuits may be engaged. Make sure binding posts are tightened. If the protection circuitry is active, the unit may cycle on and off until operating parameters return to normal. Under more serious conditions, the unit may shut off completely. Normal operation should return upon cooling, but you may be required to turn the power off and then on again to reset the unit. [. . . ]