Jbl MR Series Owners Manual

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INTRODUCTION Congratulations on choosing JBL MR Series Loudspeakers. Their highly accurate, uncolored and balanced sound character will greatly increase your enjoyment of recorded music and movies. JBL speakers are built with careful attention to detail, using only the highest quality materials. They will provide many years of excellent performance. The MR Series is the result of com- bining traditional JBL Signature Sound performance values with ele- gant contemporary appearance. Maximum Radiating Surface Area: MR Series transducers utilize new transducer technology by extending the surface area of the cone allow- ing for a shorter excursion of the driver without sacrificing critical air movement. Maximum Efficiency:Larger air movement coupled with shorter coil movement allows the MR transducers to be very efficient. See specifications. Maximum Transducer Control: Reduces distortion by tightening the control of driver excursion and increasing driver linearity. Smooth, Accurate, Extended Response: The MR series trans- ducers, computer-optimized dividing networks, and bass reflex cabinets combine to give clear, crisp, accu- rate, JBL Signature Sound. PLACEMENT Bookshelf Models: For the best stereo reproduction, the two loud- speaker systems should be an equal distance from your listening position and separated so that the angle between them, at the listening posi- tion, is between 40 and 60 degrees (see Fig. 1). For example, if your lis- tening position is 8 to 12 feet (2.5m to 4m) from each speaker, the two systems should be about 8 feet (2.5m) apart. Placing the loudspeak- ers in corners or against a wall will result in the strongest (not necessa- rily the most accurate) bass. Except for the M5, all MR Series speakers have their ports in the front so you can place the rear of the speaker up against a wall. In the case of the M5, do not place the speaker closer than 3 inches (75mm) to the wall behind it if possible. For the best stereo imaging, we rec- ommend that the systems be placed so that the high frequency transduc- ers are positioned approximately at ear level of a seated listener. Every room is different and there are differ- ent tastes, so donÕt hesitate to experi- ment on your own. Tower Models: The Tower models cabinet height and driver placement allow for speaker placement directly on the floor. For the best stereo reproduction, the two loudspeaker systems should be an equal distance from your listening position and sepa- rated so that the angle between 40°-60° Fig. 1 2

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them, at the listening position, is between 40 and 60 degrees. For example, if your listening position is 8 to 12 feet (2.5m to 4m) from each speaker, the two systems should be about 8 feet (2.5m) apart. Center Channel Model:As the center channel contains the dialog and other central action sounds, the speaker should be located very close to the Monitor/TV and centered with the Monitor/TVÕs center line. Place the MR Center directly on top of or directly below the Monitor/TV with the front edge of the speaker grille flush with the edge of the Monitor/TV. You should have your Left and Right speakers within a 2 ft or less height range of your Center Channel for proper sonic performance (see Fig 2). In Case Color Interference Occurs: The speaker is shielded to work with video applications, however some color interference may be observed on the TV screen depending on the type of your TV set. If color interfer- ence is observed, turn your TV off for 15 minutes and move the speaker back about 1" from the front edge of the TV. Turn on TV and recheck. If this is not far enough, move back fur- ther and experiment until the interfer- ence disappears. You may have to turn the TV off for a few minutes and turn it on again to clear the screen. CONNECTIONS To connect the loudspeaker systems to the receiver or amplifier, use two- conductor insulated wire. Your JBL dealer can recommend suitable cables, or you can buy wire at most hardware or electronic stores. We recommend #16 AWG wire as a mini- mum size. If your speaker is more than 30 feet (10m) from your receiver or amplifier, use larger diameter lower gauge wire. Connections are made at the terminals located on the back of the MR Series speakers. Preparing the Hookup Wire Carefully plan your wire lengths before cutting any speaker wire.Be sure to allow plenty of extrawire to help hide paths in corners,along baseboards, etc. 1. For Left and Right Speakers, first determine the wire length needed between the most distant speaker and the receiver or amplifier. 2. Now make the hookup wires for both speakers this length, even if one loudspeaker is much closer to your amplifier than the other. This will help maintain proper signal balance. (For the MR Center, determine the length needed from AV receiverÕscenter channel output to speaker). 3. Strip off 3Ú8" of insulation from both ends of each conductor. 4. Twist each set of thin wires into a tightly-bunched spiral. 5. At this point you need to identify a visual difference between the two conductors of each molded pair of speaker wire. Differentiating marks can be a different color wire (copper or ÒsilverÓ); a strand of yarn in one conductor; thin, raised ribs on one MR SERIES LOUDSPEAKERS 3 (2 ft. or less) (2 ft. or less) Fig. 2

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MR SERIES LOUDSPEAKERS 7 SpecificationsMR Center M5 MR25 MR26 Application Center Bookshelf Bookshelf Bookshelf Channel High Frequency 10mm Ti 2" Paper 10mm Ti 10mm Ti Dome Transducer Composite (Cone) Composite Composite Midrange Transducer n/a n/a n/a n/a (Nitrile Polymer Fibre Cone) Low Frequency Transducer 2 x 3.5" 5" 5" 6 1Ú2" (Nitrile Polymer Fibre Cone) (Neo Magnet) Crossover Frequency 4.5kHz 2.2kHz 4.5kHz 4.5kHz Frequency 80 Hz to 75 Hz to 70 Hz to 55 Hz to Response (Ð 6 dB) 20 kHz 20 kHz 20 kHz 20 kHz Sensitivity (1 Watt/1 Meter) 87 dB 86 dB 87 dB 88 dB Nominal Impedance 8 ohms 8 ohms 8 ohms 8 ohms Recommended 10 to 80 10 to 50 10 to 75 10 to 100 Amplifier Power* Watts Watts Watts Watts External Dimensions Height 5 3Ú16" 11" 12" 15" Width 141Ú4"6 1Ú2"7 1Ú2"8 1Ú2" Depth 6 5Ú8"7 1Ú4"8 1Ú2" 10" External Dimensions Height 132 mm 280 mm 305 mm 381 mm Width 362 mm 165 mm 190 mm 216 mm Depth 168 mm 184 mm 216 mm 254 mm Weight (each) 7 lbs 7 lbs 8 lbs 12 lbs 3.2 kg 3.2 kg 3.6 kg 5.5 kg Shipping Weight 10 lbs 18 lbs 20 lbs 28 lbs 4.5 kg 8.2 kg 9.1 kg 12.7 kg *The maximum recommended amplifier power rating will insure proper syste\ m headroom to allow for occasional program peaks. We do not recommend sustained operation at\ these maximum power Levels.