User manual VELODYNE SC-12 DATASHEET

[. . . ] . 10 ­ A Word About Interconnect Cables . . 10 ­ A Word About Subwoofer Placement . . 11 Selecting the Subwoofer(s) to be Controlled . . 11 ­ Using the SC-1250 to Drive Two Subwoofers . [. . . ] If the fuse blows again, refer the unit for service. (22) Master Power Switch Press the POWER switch to the ON position to activate the amplifier. If the unit is to be left unused for an extended period of time, move this switch to the OFF position to prolong the life of the amplifier. REAR PANEL CONNECTIONS ­ DETAILED EXPLANATION The SC-1250 is equipped with both speaker-level and line-level inputs. Use the RCA/Phono type "INPUT" jacks when connecting from a pre-amp, signal processor, or line-level crossover. To do this, depress BOTH the Crossover UP and Crossover DOWN buttons simultaneously. The numeric LED will show indicating that the low-pass crossover has been defeated. To reactivate the low-pass crossover, simply push the crossover UP or crossover DOWN buttons. -- A W o r d A b o u t Yo u r R e c e i v e r ' s C r o s s o v e r and the SC-1250 Crossover Your Velodyne SC-1250 amplifier is designed to operate using the full range audio signal for input when using the built-in crossover. Many home theater processors/receivers (Dolby Digital®, DTS®, THXTM) have a "subwoofer out" jack that performs this same function and are designed to be used with a powered subwoofer. In these installations, you may want to bypass the crossover in either the processor or the Velodyne SC-1250 as described above. However, in some cases you may want to use BOTH crossovers. If you choose to do this you should stagger the frequencies, (i. e. , 120 Hz subwoofer, 80 Hz processor) for best results. CAUTION: there is no anticlipping or anti-distortion protection on this setting. To change the subwoofer to be controlled, first power down the amplifier using the power switch on the back panel (DO NOT use the power button on the front panel). Then, turn the switch on while depressing any of the buttons on the front panel (crossover up or down, or volume up or down). The unit will show the model it is currently controlling. To change the model, simply push the crossover up or crossover down buttons and the model changes on the LED display. Once the desired model is seen on the LED display, simply release the button. You don't need to do anything else - the model to be controlled is automatically stored in the SC-1250's www. velodyne. com SubContractor User's Manual . 11 memory. To exit model selection mode, use the power switch on the back panel to power down and power up the unit. You should see the model you selected for 2 seconds on the LED display before the display reverts to the volume. Using the SC-1250 to Drive Two Subwoofers Once the model selection process is completed, no other adjustments are needed to enable the SC-1250 to drive one or two subwoofers. Usage This section addresses day-to-day usage of your SC-1250 amplifier. Remote Control The features of the SC-1250 remote control are listed below. · POWER -- This button forces your SC-1250 unit into standby mode. The power LED turns amber, the numeric LED shuts off, and the amplifier puts out no power. [. . . ] We recommend replacing the batteries in the remote. 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. [. . . ]