User manual VELODYNE CHT-12 REV B

[. . . ] For example, the subwoofer should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or placed in a built-in installation such as a bookcase or cabinet that may impede the flow of air through the ventilation openings. Heat -- The subwoofer should be situated away from heat sources such as radiators, heat registers, stoves, or other subwoofers that produce heat. Power Sources -- The subwoofer should be connected to a power supply only of the type described in the operating instructions or as marked on the subwoofer. Power-Cord Protection -- Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point at which they exit from the subwoofer. [. . . ] Power switch The master power switch is located on the right half of the unit. This switch should be set to position 1 for on (up), 0 for off (down). Smaller speakers with limited low frequency output may prefer the higher 100Hz setting which will reduce the low frequencies sent to them. Larger speakers with greater low frequency output may be able to handle the 80Hz setting without strain. Auto turn on function With this function in the "auto" position, your CHT-8/CHT-10/CHT-12 can be safely left with the main power switch on continuously. The subwoofer will turn itself on automatically when an audio signal is present. If no signal is present for approximately 10 minutes, the unit will switch to standby mode. This function can be disabled by leaving the switch in the "on" position. Phase adjustment- 0°/180° This control allows you the "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. Then move the switch from one position to the other and listen for a change in low frequency output. The correct position will have a greater amount of apparent low frequency output. Subwoofer Direct 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. When installed in this fashion, your satellite speakers will be crossed over at 80/100Hz (or 85Hz for CHT-8/-10) which removes the lower bass from your amplifier and speakers, enabling them to do a better job reproducing high frequencies. By utilizing this method, you will have a bi-amplified system, gaining improved power and headroom for your system. Figure 1 shows connection to a pre-amplifier's main outputs and returning them to your amplifier inputs. Figure 1: Installation using line-level (RCA/Phono jack) inputs 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 Digital, DTS, THX) have a "subwoofer out" jack that is internally filtered and designed to be used with a powered subwoofer. You may also connect your satellites directly to your receiver or amplifier along with the subwoofer if you wish to bypass the internal high-pass crossover. When connected in this fashion, your satellite speakers will be crossed over at 80/100Hz (or 85Hz for CHT-8/-10), which removes the lower bass from your speakers, enabling them to do a better job reproducing high frequencies. [. . . ] Do not place the cabinet next to sources of heat such as furnace registers, radiators, etc. Do not place the unit near sources of excessive moisture, such as evaporative coolers, humidifiers, etc. The power cord should be routed in such a way that it will not be walked on, pinched, or compressed in any way that could result in damaging the insulation or wire. True subwoofers operate at extremely low frequencies which are primarily omni-directional. [. . . ]