Infinity Primus P 153 Owners Manual
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2 INFINITY PRIMUS SPEAKERS INFINITY PRIMUS ® SERIES The Primus series of loudspeakers continues the longstanding Infinity \ commitment to accurate sound reproduction. Our proprietary MMD ® (Metal Matrix Diaphragm) drivers, precision dividing networks and rigi\ d, well-braced enclosures combine to deliver uncompromised performance in any stereo or multichannel home theater system. In addition, Primus series speakers are magnetically shielded for safe placement adjacent to\ a television. UNPACKING THE SPEAKERS If you suspect damage from transit, report it immediately to your dealer\ . Keep the shipping carton and packing materials for future use. PLACEMENT Stereo Before deciding where to place your Primus speakers, survey your room and think about placement, using Figure 1 as a guide and keeping the following points in mind: For best results, place the speakers 6 to 8 feet (1.8 to 2.4 meters) - apart. Position each speaker so that the tweeter is approximately at ear level.\ - Generally, bass output will increase as the speaker is moved closer to - a wall or corner. Refer to the Home Theatersection on this page if you plan to use\ the - speakers for home theater reproduction. Couch/listening position Stereo player Right channel Left channel Figure 1. This overhead view shows a typical stereo-speaker plan. Experiment with speaker placement to obtain the best bass level and stereo imaging in your room. Home Theater For front-channel use, place one speaker on the left and another on the right of the television monitor. Since the speakers are magnetically\ shielded, you can place them without worrying about their distorting the\ TV picture. For surround-sound use, place the speakers alongside the listening position. Final placement depends on room acoustics, availability of spa\ ce and your listening preference (Figures 2 and 3). Place the center-channel speaker on top of or directly below the television. Aim it toward the listening area. NOTE: An Infinity powered subwoofer will add impact and realism to both music and film soundtracks. Contact your Infinity dealer for recommendations on subwoofer models. Couch Front right channel Front left channel Center channel Surroundright channel Surround left channel Infinity subwoofer (optional) Figure 2. This overhead view shows a typical home theater plan. The left/ right rear channels are for a seven-channel system. The center rear channel is for a six-channel system. Couch Front right channel Infinity subwoofer(optional) Front left channel Center channel Surround right channel Surround left channel Figure 3. This figure shows an alternate layout, which may be more suitable for some rooms. The left/right rear channels are for a seven- channel system. The center rear channel is for a six-channel system.
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3 INFINITY PRIMUS SPEAKERS W ALL -M OUNTING THE P143, P153 AND PC251 We have designed the P143, P153 and PC251 speakers to mount directly onto a wall. Each speaker has two keyholes on the back and will require \ two 1-1/2" (38mm), #10 wood screws fastened to a wall stud. If a wall \ stud is unavailable, install an anchor appropriate for a 1-1/2", #10 screw. NOTE: You are responsible for the correct selection and use of mounting hardware (available through hardware stores) that will ensure the prop\ er and safe wall-mounting of the speakers. Figure 4. – + Keyhole mounts 1/4" - 20 threaded insert (P143 only) Step 1. Mark the positions on the wall where you would like to place the mountin\ g screws. Step 2. Fasten two 1-1/2", #10 wood screws to the wall using the markings from Step 1 as your guide. Leave an 11/16" (17.5mm) space between the \ wall and screwhead. If a wall stud is not available, use an appropriate ancho\ r. Step 3. Place the speaker on the wall by aligning the keyholes on the back of th\ e speaker to the screwheads on the wall. Once positioned properly, the speaker should slide down slightly and become secure. The P143 also allows you to use third-party wall brackets using the 1/4"-20 threaded insert located beneath the keyhole mount. Consult the wall-bracket manufacturer to select the proper bracket. CHANGING THE P253 AND P363 F EET The P253 and P363 feature attractive outboard feet, installed at the factory. However, if you would like to replace them with the less visibl\ e inboard feet (included), follow the instructions below. Remove the four feet on the bottom of the speaker by loosening the 1. screw in each foot. Keep the screws for later use. Remove the rubber plug from each inner hole (and save it for possible 2. future use). Attach the black inboard feet to the inner holes from which you just 3. removed the rubber plugs. Use the same screws that you just removed. Tighten the screws securely, using a handheld Phillips (+ tip) 4. screwdriver. Do not use a powered screwdriver of any type. CAUTION: Floorstanding (tower) loudspeakers have a high center of gravity and may become unstable and tip over during earthquakes or if they are rocked, tipped or improperly positioned. Consider anchoring these speakers to the wall behind them, using the procedures and hardware customary for anchoring bookcases and wall units. You are responsible for proper installation and proper selection of hardware.