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A well designed subwoofer, properly integrated into your system will enhance your listening pleasure dramatically by providing the bass foundation upon which most music and special effects are built. The 272 PBM THX is capable of delivering very high output levels and wide dynamic range. When properly placed it will provide smooth in-room bass response down to approximately 20Hz, with a peak SPL of over 105dB (2000 cubic foot space). The built-in proprietary high-current Class A/B amplifier is conservatively rated at 225 watts RMS. This amplifier, coupled with the massive 12" long-throw woofer in a sealed enclosure, generates musically accurate deep bass with a minimum of distortion. Your Atlantic Technology powered subwoofer will smoothly integrate with virtually all other brands of loudspeakers on the market. From the premium quality gold plated connectors to the clearly marked controls, this is one of the most versatile high performance subwoofers you can buy. What’s THX? THX is a series of standards and technologies developed by Lucasfilm Ltd. (of Star Wars fame). These are intended to ensure that what you hear and see on your home system, as closely as possible, matches what the director heard and saw during the final production of the film. THX is intended to enhance every type of viewing and listening experience including the latest discrete multichannel digital formats. Please note however that THX is not a separate surround format. THX Select standards are based upon a room size of 2000 cubic feet (L x W x H). THX Ultra standards are based upon a room size of 3000 cubic feet. This does not mean these components must be used in rooms this exact size. The room sizes simply provide a frame of reference, as they indicate that these systems must deliver a minimum level of performance in these specified room sizes. Your 272 PBM is THX Select certified. Features Your Atlantic Technology powered subwoofer has been engineered using the latest technology and finest components available. It features: . A long-throw 12" composite cone driver with a vented 9.5 pound motor structure and 2” high temperature, 4 layer voice coil This powerful driver has a very stiff cone that acts as an almost perfect piston throughout its operating range. Its massive magnetic motor assembly and high temperature component parts deliver exceptional performance and reliability. In fact, its basic motor assembly is identical to that from our top-of-the-line 15" subwoofers! . Sealed enclosure design for low distortion and deep bass output Sealed enclosure woofer designs are inherently low in distortion and naturally deliver deep, smooth bass response with a gradual and predictable roll-off below resonance. As with all Atlantic Technology subwoofers, we have paid inordinate attention to giving you accurate musical bass reproduction along with terrific special effects. aaaaaaaaaaaaaaaaaaaaaaaaa0 2 aaaaaaaaaaaaaaaaaaaaaaaaa0 Model 272 PBM THX Atlantic Technology ® . A linear power high current Class A/B amplifier conservatively rated at 225 watts RMS This advanced amplifier is a fully discrete design utilizing audiophile grade component parts including a custom-wound, low-hum Torroidal transformer. The output stage is capable of very high current delivery for exceptional driver control. As a custom designed amplifier it has been precision matched and equalized to the 12" driver. Together they deliver powerful, controlled bass with great articulation and authority. . A useful in room working frequency range of 20Hz to 180Hz Many subwoofers offer specifications that look great on paper, but in real world use deliver less than promised. Atlantic Technology subwoofers are over-designed to ensure that they will deliver their rated performance in your room, when properly placed and adjusted. . An adjustable (55Hz to 140Hz) @ 18dB per octave low-pass crossover The steep upper end roll-off slope of 18dB per octave allows for much better bass integration with the satellite speakers while making the woofer less localizable. Note: If you are using a surround Processor/Receiver that includes its own filtered subwoofer output (or a THX Certified Processor/Receiver), we strongly recommend that you set the 272 PBM THX crossover control to the THX/Bypass position. . Two low level inputs, two low level thruputs The thruputs allow daisy chaining of multiple subwoofers, or as a return path back to the processor. . Two high level inputs, two high level thruputs These let you connect the subwoofer to your amplifier using the amplifier’s speaker outputs. Once again, you can daisy chain to another subwoofer using the unmodified signal that comes out of the thruput connectors. . A Phase Invert switch (Normal/Invert) This switch allows precise acoustic matching with satellite speaker systems whose output may be phase reversed. This switch also allows you to compensate for unusual room acoustics that occur when the woofer is physically separated from the midrange/...