User manual VELODYNE CHT-Q

[. . . ] CHT- 8Q Series CHT-10Q CHT-12Q CHT-15Q USER'S MANUAL Remote Controlled Home Theater Subwoofers . www. velodyne. com CHT-Q Series User's Manual i Ta b l e o f C o n t e n t s Congratulations . . 18 . www. velodyne. com CHT-Q Series User's Manual ii Congratulations! Congratulations on your purchase of a Velodyne CHT-Q subwoofer. This system represents the state-of-the-art in low frequency reproduction. Read and follow the instructions below to ensure safe and proper system operation. [. . . ] (2) SPEAKER LEVEL INPUT Terminals Connect these input terminals to the speaker output terminals of your amplifier or receiver. If you use this method of connection, when you go to the receiver speaker set up menu, make sure you select the large speaker option. SPEAKER LEVEL OUTPUT Terminals Sends a crossed-over speaker-level signal to the front speakers. Your amplifier section will notice no additional loading effects when you use these inputs because of their high impedance. Note: Do not use both the RCA/Phono "INPUT" connections and "SPEAKER LEVEL INPUT" connections simultaneously. Low-Pass Crossover Both sets of inputs sum the left and right channels together and the resulting signal is passed 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 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 70 Hz. Subwoofer Direct Subwoofer Direct is a setting on the low-pass crossover knob and will allow frequencies up to 120 Hz into the subwoofer. See below for a more detailed explanation of this feature. . www. velodyne. com CHT-Q Series User's Manual 8 C ro s s ov e rs Receiver/Processor Subwoofer Outputs The Velodyne subwoofer is designed to operate using the full range audio signal for input when using the built-in crossover. Many home theater processors/receivers (Dolby DigitalTM, DTSTM, THXTM) have a "subwoofer out" jack (sometimes labeled "LFE") that is internally filtered, settable at the receiver/processor, and designed to be used with a powered subwoofer. In some installations, it may be beneficial to use BOTH the Velodyne crossover and the receiver/processor crossover, resulting in a steeper ultimate crossover slope. In some rare cases, combining both an external crossover and the one internal to the subwoofer may result in low output and increased noise. In these installations you may need to bypass the crossover in either the processor or your CHT-Q subwoofer, or simply setting one crossover to a higher frequency (such as 120 Hz) will restore maximum performance. (Refer to Figure 2a Line-Level Subwoofer Connection Diagram and Figure 2b Speaker-Level Subwoofer Connection Diagram, pages 10 and 11 for connection diagrams. ) . www. velodyne. com CHT-Q Series User's Manual 9 FRONT REAR SUBWOOFER OUTPUT JACK AMPLIFIER Figure 2a. Line-Level Subwoofer Connection Diagram . www. velodyne. com CHT-Q Series User's Manual 10 SUBWOOFER OUTPUT JACK AMPLIFIER REAR FRONT Figure 2b. Speaker-Level Subwoofer Connection Diagram . www. velodyne. com CHT-Q Series User's Manual 11 FRONT RIGHT SPEAKER FRONT LEFT SPEAKER Interconnect Cables When installing your new Velodyne subwoofer using the line level connections, you should always use shielded phono cables. It is recommended that you keep the length of cable as short as possible to avoid any potential noise problems. When using speaker level connections, use a high quality speaker cable that mates well with the connectors. Be very careful to avoid any loose strands or frayed wires that may result in a short, which may damage your equipment. Cables of extremely large size are not required due to the low current draw of this type of connection. [. . . ] If the unit has been running at high levels, one of the protection circuits may be engaged. If the protection circuitry is active, the unit may cycle on and off until operating parameters return to normal. Normal operation should return upon cooling, but you may be required to turn the power off and then on again to reset the unit. The following conditions require service by a qualified technician: 1. [. . . ]