User manual ATLANTIC TECHNOLOGY 642E SB

[. . . ] Instruction Manual Model 642e SB High Performance C. O. R. E. Technology THX Select Certified Powered Subwoofer 2 Safety Precautions Model 642e SB Powered Subwoofer Safety Precautions Table of Contents 3 3 4 5 6 Model 642e SB What's THX?Subwoofer Rear Panel Features Connecting Your Subwoofer CAUTION: To reduce the risk of electric shock, do not remove the cover (or back). WARNING: To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture. [. . . ] The last step in wiring your system should be plugging in the AC cords! Subwoofer Line Out to Low Level In Run an RCA cable from your receiver's Sub Out jack to the L/Mono input jack on the back of the 642e SB (Figure 3). If your receiver/processor has stereo subwoofer outputs, connect these to both the L/Mono and R jacks AC INPUT 50-60Hz 300W MAX on the back of the 642e SB (Figure 4). Using the Low Level Output 110-120V 220-240V If desired, you can run a low level signal through the 642e SB and out to another unit. This way you can add an additional subwoofer with minimal additional wiring. The signal that comes out of the output jacks is identical to the input signal. ON OFF Power Connection Connect the power cord to an AC outlet only after making all other connections to the subwoofer. This will avoid any chance of accidentally activating the subwoofer while wiring. Atlantic Technology does not FOR 110-120VAC, USE 3A L 250V FUSE recommend plugging the subwoofer FOR 220-240VAC, USE 2A T 250V FUSE into the switched outlet of an amplifier, preamplifier, or receiver. The power demands of the subwoofer amplifier may exceed the power rating of the switched outlet and may damage the equipment. The 642e SB is totally automatic in its operation. The automatic on/off circuitry will only activate the subwoofer in the presence of an audio signal from your system. After 7-10 minutes with no signal detected from the rest of the system, the amplifier will shut itself off and go back into standby mode. When the sub is in operating mode, the power LED located under the front grille will glow green. The LED will glow yellow in the Standby mode and power consumption in this mode is negligible. Set the phase switch to normal, and the front panel variable level control (Figure 6) to the THX/Fixed position. Play some music that you know has good bass content, and turn the level control up until you just start to hear the subwoofer working. Now, from your normal listening position, determine whether the subwoofer is playing loudly enough and filling in the bass frequencies of the music evenly. If adjustment is necessary, start by changing the setting in the processor or on of the front panel level control, if your processor lacks a subwoofer level adjustment. If the bass seems too ponderous, boomy, or heavy, no matter how you set the level, try moving the subwoofer away from the wall/corner. If the bass seems too thin, try moving the subwoofer closer to the wall/ corner. Small differences in positioning can make big differences in bass response. When you find a position that seems to work well, try switching the phase switch between its two settings, listening particularly to the transition from the subwoofer to the satellites. 3. Move away from wall for less bass System Set Up When setting up a complete home theater we strongly recommend that you use a Sound Pressure Level meter. Radio Shack® has a good one that is very affordably priced (approximately $40-50). [. . . ] Higher crossover frequencies may be suitable, however, when using very small satellites that have no real low frequency performance. Settings lower than 80Hz should be employed if you are using larger speakers that have extended bass response. This way, the subwoofer will only reproduce the very lowest bass frequencies that are in the range where the large main speakers begin to roll off. ON IMPORTANT: Save Your Boxes!If you can do so, save the carton, packing pieces and plastic bags that came with your subwoofer. [. . . ]