User manual ATLANTIC TECHNOLOGY 452 PBM INSTRUCTION MANUAL

[. . . ] The Home THX system takes a soundtrack that was mixed and equalized to play back in a large theater and adapts it to reproduce more naturally when experienced in the smaller space of your home. It is important to realize that THX is not a recording process or a special decoding system. All motion pictures will be reproduced as they were heard in the film studio dubbing stage through the Home THX system, no matter what surround decoding system is used. Whether you are using Dolby Digital (AC-3), DTS, Dolby Pro Logic, or any other system, Home THX will make the experience more natural and lifelike. [. . . ] It is also useful when your receiver/ amplifier/processor does not internally incorporate a low pass filter. 6 Model 452 PBM THX Atlantic Technology® Receiver/Amplifier Example 5: Speaker Out/ High Level In for 1 Subwoofer This is the most common method for connecting a subwoofer to a system without a dedicated subwoofer line out or Preamp outputs. Main Speakers Left Right HI PASS OUT LOW LEVEL IN THRU L/MONO RIGHT L/MONO HI LEVEL INPUT RIGHT Left Front Speaker Sub Woofer Right Front Speaker Example 6: Speaker Out/ High Level In for 2 Subwoofers This is the most common method for connecting 2 subwoofers to a system without a dedicated subwoofer line out or Preamp outputs. Note that the L/MONO High Level input is used on both left and right subwoofers. Main Speakers Receiver/Amplifier Left Right HI PASS OUT LOW LEVEL IN THRU L/MONO RIGHT HI PASS OUT LOW LEVEL IN THRU L/MONO RIGHT L/MONO HI LEVEL INPUT RIGHT L/MONO HI LEVEL INPUT RIGHT Left Front Speaker Left Sub Woofer Right Sub Woofer Right Front Speaker 7 Model 452 PBM THX Atlantic Technology® Option 1 THX Receiver/Amplifier/Processor THX Example: THX Subwoofer Out/Low Level In Option 1 is the most commonly used method of connecting two subwoofers to a THX system. You may also use a Yadapter as shown in Option 2. Option 2 THX Receiver/Amplifier/Processor THX Sub Woofer Out THX Sub Woofer Out Y-adapter HI PASS OUT LOW LEVEL THRU IN L/MONO RIGHT HI PASS OUT LOW LEVEL THRU IN L/MONO RIGHT HI PASS OUT LOW LEVEL THRU IN L/MONO RIGHT HI PASS OUT LOW LEVEL THRU IN L/MONO RIGHT Single Sub Woofer Optional Second Sub Woofer Single Sub Woofer Optional Second Sub Woofer Note: The front panel level control and the rear panel subwoofer lo-pass control must be in the THX position for proper THX operation. You can connect your 452 PBM THX by using a variety of connectors, or by removing 1/2" of insulation from each wire end, twisting the strands of wire together, placing the wire through one of the post holes and screwing down the nut tightly. We recommend that you check your local electrical codes to make sure you are not using an improper connector. It is important to observe polarity while making speaker connections: red (+) terminals on the amplifier to red (+) on the speaker, black (-) on the amplifier to black (-) on the speaker. Look carefully at the wires you are using and note that one of the wires in each pair is marked by either a different color, printing, ridges, or a thread intertwined with the wire strands. By convention, the marked wire is connected to the red (+) terminal. Figure 2: Speaker Wiring Terminals 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. The AC cord should be plugged into its own wall outlet or into a quality power strip. Avoid using a switched outlet on the rear panel of another component. The subwoofer can draw more current than these outlets can provide and performance will suffer. Once the subwoofer is hooked up and the power switch is turned on, leave it on. The automatic on/off circuitry will only activate the subwoofer in the presence of an audio signal from your audio/video system. After 7-10 minutes with no signal detected from the rest of the system, the amplifier will shut itself off and go into standby mode. When an audio signal is present, the power LED will glow green. Power consumption in the standby mode is negligible. 8 Model 452 PBM THX Atlantic Technology® Changing the Fuse To change the fuse, remove the power cord, insert a screwdriver tip into the notch in the side of the fuseholder, and pry it out. Replace with the correct value fuse and push back into place. Fuse values are marked adjacent to the IEC AC socket. Insert screwdriver tip here Figure 3: The fuse is located next to the IEC AC socket Placement and Operation The Model 452 PBM THX Powered Subwoofer should be placed in the front of the room, close to a corner (Figure 4). Every room has its own unique sound, and flexibility in the exact placement of the subwoofer is always desirable. In general, the closer the woofer is placed to a corner, the more bass response you will hear. [. . . ] All the subwoofer's inputs are active at all times. Move the subwoofer closer to a wall or corner. Check speaker wire connections and reconnect in proper phase. Audible buzz or hum More than one source audible Weak bass More than one source is playing. Subwoofer too far from the wall. Input source connected to HI LEVEL inputs is wired out of phase. Weak bass: vague stereo image 11 Model 452 PBM THX Atlantic Technology® Model 452 PBM THX Specifications Bass Driver Output Power (rms) Distortion (amplifier) Frequency Response (±3 dB) Input Impedance High Level (speaker) Low Level (line) Peak SPL Dimensions (W X H X D) Weight Power Requirements 15 high excursion" 325W 0. 025% 25Hz ­ 500Hz 10k 1k 110dB 16. 75 x 22. 625 x 19. 625in 425 x 575 x 500mm 86lbs/39kg 110V AC 50/60Hz 240V AC 50/60Hz Specifications are those in effect at the time of printing. [. . . ]