User manual VELODYNE INPACT-12 REV C

[. . . ] Record the serial number in the space provided on page 13 for future reference. Product Features · Driver configurations: Impact-Mini -- 6. 5" (5" piston diameter) active subwoofer and 64 ounce (4. 0 lb) motor structure and 8" (6. 5" piston diameter) passive radiator or, Impact-10 -- 10" (8. 2" piston diameter) subwoofer and 89. 6 ounce (5. 6 lb) motor structure or, Impact-12 -- 12" (9. 7" piston diameter) subwoofer and 89. 6 ounce (5. 6 lb) motor structure · Class D amplifier · Adjustable (50 to 200 Hz) low-pass crossover with a 12 dB/octave slope · Line-level (RCA) inputs · Speaker-level inputs and outputs · Signal sensing auto turn on/off · Variable volume control · Selectable phase control (0° or 180°) · Green (power on) / Red (power standby) mode indicator LED Prepare for Installation Your new Velodyne subwoofer 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 to prevent possible damage. . www. velodyne. com Impact Series User's Manual 1 Placement The first step in installing your new Impact sub is to determine where it will be placed in the room. [. . . ] 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. This control should be set to achieve similar output levels from both the main speakers and subwoofer when listening to music. A good starting point for the volume control is two or three graduations from minimum. Warning: Some manufacturers preset their receivers with the Sub-Out channel signal at a minimum level. It is very important to verify that your receiver Sub-Out channel is set to the same output level as your front right and left channels. Refer to your receiver manual for the individual channel level adjustment procedure. If your receiver Sub-Out channel is set too low, the subwoofer may appear to have a weak output, it may sound noisy or distorted, and the Auto On/Off feature may not operate properly. . www. velodyne. com Impact Series User's Manual 3 Low-pass Crossover - 50 to 200 Hz As noted above, all inputs sum the left and right channels together, with the resulting signal passing through an adjustable low-pass crossover before being amplified. The crossover control allows you to adjust the upper limit of the subwoofer's frequency response from 50 to 200 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. 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 depress the phase 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. For all installations, experiment with the phase switch to determine the setting (0 or 180 degrees) that produces the most mid-bass. If the settings sound similar, we recommend the "0" position. A u t o Tu r n o n F u n c t i o n The subwoofer will turn itself on automatically when an audio signal is present. If no signal is present for approximately eight minutes, the unit will switch to standby mode (Red LED). Warning: If the Sub-Out channel signal level from your receiver is too weak, this feature will not operate properly and shut the subwoofer off while you are listening to it. To correct this, see VOLUME CONTROL section on previous page. . www. velodyne. com Impact Series User's Manual 4 R e a r Pa n e l C o n n e c t i o n s 2 3 4 5 1 6 7 Figure 1. Impact Rear Panel Connections Figure 1 shows the connections on the rear panel of the Impact. Following are brief descriptions of the connections described in Figure 1. More detail of these connections can be found below: (1) (2) LINE INPUT jacks - Connect these jacks to the LINE OUT jacks of the amplifier. SPEAKER LEVEL OUTPUT terminals - The speaker-level signal to the front speakers is output from these terminals. [. . . ] VELODYNE is not responsible for damage caused by accidents, abuse, misuse, natural or personal disaster or unauthorized modification. The VELODYNE products are not intended for professional or commercial use and VELODYNE is not responsible for damage resulting from such use. The VELODYNE product warranty is limited to units that are purchased from authorized VELODYNE dealers and finalized within authorized dealer locations. 6. TO OBTAIN SERVICE Information regarding service may be obtained from the dealer from whom you purchased the unit, or by contacting VELODYNE customer service. [. . . ]