JBL CFSERIES Portable Speaker User Manual
Contents
1. CF SERIES LOUDSPEAKERS OWNER S MANUAL INTRODUCTION Congratulations on choosing JBL CF Series Loudspeakers Their high efficiency and bass response will greatly increase your enjoyment of recorded music JBL speakers are built with careful attention to detail using only the highest quality materials They will provide many years of excellent performance Your CF Series Loudspeakers are very easy to set up We recommend that you take a few minutes to read this owner s manual before you begin and follow the instructions carefully ENGINEERING FEATURES 1 High Efficiency Modest amplifiers or receivers will be able to produce acoustic levels normally associated with amplifiers of substantially higher power ratings 2 Cast Frame Woofer The aluminum die cast woofer frame offers more rigidity than a stamped steel frame The stronger frame provides a solid foundation for the magnet assembly and cone amp coil result ing in a more linear woofer movement and less distortion With the aluminum frame there is no loss of flux from the magnet assembly as is the case with steel frames allowing the voice coil to receive the full strength of the magnetic field 3 Titanium Laminate Tweeter Repro duces high frequency sound waves with accuracy bringing out clarity and realism 4 Tuned Port Bass Design Extends low frequency response reduces distortion and improves power handling capacity PLACEMENT For the best stereo re2. and descriptions but will always equal or exceed the original specifications unless otherwise stated JBL Consumer Products Inc 80 Crossways Park West Woodbury NY 11797 8500 Balboa Boulevard Northridge CA 91329 Declaration of Conformity CE We JBL Europe A S Kongevejen 194B DK 3460 Birker d DENMARK declare in own responsibility that the products described in this owner s manual are in compliance with technical standards EN 50 081 1 1992 EN 50 082 1 3 1995 800 336 4JBL 4525 H A Harman International Company E Ae Birker d DENMARK 2 96 Part No 15 30 4142 00
3. hide paths in corners along baseboards etc 1 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 loud speaker is much closer to your amplifier than the other This will help maintain proper signal balance 3 Strip off 3 8 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 silver a strand of yarn in one conductor thin raised ribs on one part of the outer insulation or a printed marking on one of the insulators It does not make any difference which of the two strands of wire go to and on the speakers and amplifier as long as both speakers are connected identically If using wire ends unscrew the colored nut on the terminal cup insert the wire end into the hole in the metal post then retighten the nut until the wire is tightly secured If using banana plugs simply insert the plug directly into the holes on the top of the metal posts For each channel the red terminal on the loudspeaker should be connected to the red or loudspeaker connection terminal on the receiver or amplifier and the black to the black or speaker connection
4. er cited in B above If the receiver amplifier has a specification similar to that shown in A above or if your second set of speakers has an impedance other than 8 ohms you must consult the receiver amplifier manufacturer for clarification POWER HANDLING Thanks to their high efficiency JBL CF Series loudspeakers will produce reasonable volume levels in a room of moderate size with very little amplifier power However using a small amplifier to obtain the desired volume listening levels may lead to overdriving the amplifier This will generate high distortion levels and may cause damage to your loudspeaker For the best performance an amplifier should be selected with an output rating that is greater than the maximum power that will be used This margin of reserve power will ensure that the amplifier will not attempt to deliver more power than its design allows However the power amplifier s power rat ing per channel must not exceed the maxi mum recommended amplifier power for that specific loudspeaker model Please see the specifications section for details Following these guidelines will provide distortion free sound reproduction and long loudspeaker life es CF SERIES LOUDSPEAKERS TROUBLESHOOTING Most malfunctions end up being traced to connections or switch settings To avoid packing up correctly functioning speakers and sending them off only to find that they re not really at fault check the following tips firs
5. factory Specifications CF80 CF100 CF120 CF150 Application 2 Way Bookshelf 3 Way Floorstanding 3 Way Floorstanding 3 Way Floorstanding High Frequency Dome Transducer 14 mm Ti Laminate 14 mm Ti Laminate 14 mm Ti Laminate 25 mm Mylar Laminate Mid Frequency Polymer Laminate n a 4 1 2 4 1 2 6 1 2 Low Frequency Polymer Laminate 8 10 12 15 Crossover Frequencies 4 5kHz 1400Hz 7kHz 800Hz 7kHz 850Hz 4 5kHz Frequency Response 6dB 43Hz to 20kHz 39Hz to 20kHz 36Hz to 20kHz 32Hz to 20kHz Sensitivity 1 watt 1 meter 92dB 94dB 96dB 98dB Nominal Impedance 8 Ohms 8 Ohms 8 Ohms 8 Ohms Recommended Amplifier Power 10 to 100 watts 10 to 175 watts 10 to 250 watts 10 to 325 watts External Dimensions H x W x D 19 5 8 x 11 x 11 3 8 27 x 12 13 16 x 11 11 16 31 1 2 x 16 1 2 x 15 35 x 17 7 8 x 18 15 16 498 x 279 x 289mm 686 x 325 x 297mm 800 x 420 x 381mm 889 x 454 x 481mm Weight each 23 Ibs 10 4 kg 32 Ibs 14 5 kg 50 Ibs 22 7 kg 62 Ibs 28 1 kg The maximum recommended amplifier power rating will ensure proper system headroom to allow for occasional program peaks We do not recommend sustained operation at these maximum power levels JBL continually strives to improve its products New materials production methods and design refinements are introduced into existing models without notice as a routine expression of our design philosophy For this reason JBL loudspeakers may differ in some respect from their published specifications
6. he CF120 amp CF150 have fuses which will protect the speaker from being overpow ered under normal conditions Unscrew the cap labeled fuse and replace with a 250V 5 x 20mm slow blow TDS type fuse 2 5 Amp for CF120 3 0 Amp for CF150 Replacement with any other type fuse will void your JBL warranty GENERAL CARE The grille is held in place by pins near the edges To remove the grille grasp it by both top and bottom edges and pull gently To replace reposition it carefully and press gently at the corners Do not push on the center area of the grille The loudspeaker cabinet may be cleaned with a slightly damp cloth To remove dust from the grille cloth use a vacuum with a brush attachment Spots may be removed with a commercial spot remover Do not use any cleaners or solvents on the speaker drivers themselves SERVICE Should your loudspeaker ever need service return it to the JBL dealer from whom it was purchased If for some reason this is impractical in the United States call 800 336 4JBL for your nearest warranty station Military personnel who purchased from authorized military outlets should return them to a similar outlet or contact Mohawk Marketing Corp 149 Business Park Drive P O Box 62229 Virginia Beach VA 23462 Phone 804 499 8901 FAX 804 497 6690 If purchased outside the United States contact your local distributor to make arrangements for repair service Do not return products to the JBL
7. production the two loudspeaker systems should be an equal distance from your listening position and separated so that the angle between them at the listening position is between 40 and 60 degrees see Fig 1 For example if your listening position is 8 to 12 feet 2 5 to 4 m from each speaker the two systems should be about 8 feet 2 5 m apart Placing the loudspeakers in corners or against a wall will result in the strongest not necessarily the most accurate bass The CF80 is ported on the front to allow placement directly up against a bookshelf or wall Since the other CF Series models are ported on the back panel do not place these speakers closer than 12 inches 305 mm to the wall behind it if possible 40 60 Fig 1 CONNECTIONS To connect the loudspeaker systems to the receiver or amplifier use two conduc tor 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 minimum size If your speakers are more than 30 feet 10 m from your receiver or amplifier use larger diameter wire Connections are made at the terminals located on the back of the loudspeaker system The terminals accept bare wire or dual banana plugs either of which will pro vide easy secure connections Preparing the hookup wire Carefully plan your wire lengths before cutting any speaker wire Be sure to allow plenty of extra wire to help
8. t before requesting service No sound at all or very faint sound from both speakers 1 Amp receiver tape monitor button pushed in while using CD FM or phono inputs 2 Wrong speaker switch A or B speaker output 3 Sound source CD cassette deck turntable not turned on not activated not hooked up or not selected on amp receiver front panel 4 CF120 Blown fuse see Fuse Replacement No sound from one speaker 1 Balance control turned all the way left or right 2 Speaker wire has become disconnected 3 One of the connections between sound source and amp receiver is faulty or has become disconnected Both speakers play at low volumes but shut off as volume is increased OR sound turns on and off intermittently 1 A few strands of speaker wire may be shorting out Recheck the connections 2 More than 1 pair of speakers are connected to the amp and the total impedance is too low Recheck the minimum impedance requirements of the amp Bass is very weak AND OR sound seems to come from each speaker separately without creating a stable stereo image between the speakers 1 The polarity amp of one speaker has been reversed relative to the other Double check connections 2 Speakers are too far away from back and side walls or too far apart Experiment again with the speaker placement If you are still encountering problems consult your JBL dealer E CF SERIES LOUDSPEAKERS FUSE REPLACEMENT T
9. ter minal see Fig 2 Connecting the loud speakers in this manner ensures that they will be in phase that is work together rather than in opposition Connecting the loudspeakers out of phase will not dam age them but will result in less bass and poor imaging Left Right Speaker Speaker Red Blk Red BIk Amplifier Receiver Fig 2 Hooking up multiple sets of speakers If your receiver has two complete sets of speaker terminals A and B it s possi ble to hook up an additional pair of speak ers for simultaneous sound in another room However some speakers may not be usable as a second pair if you want to play two sets at once Before hooking up another set of speakers besides your CF Series check the following 1 Your receiver or amplifier minimum load impedance Impedance is always expressed in ohms and can be found in the owner s manual that came with your unit For example the following are typical entries in receiver amplifier owner s manuals A 100 watts RMS into 8 ohms both channels driven 20 20kHz with less than 0 02 THD B 160 watts RMS into 4 ohms both channels driven 20 20kHz with less than 0 02 THD 2 The nominal impedance of the sec ond set of speakers A pair of CF Series speakers when combined with another pair of 8 ohm speakers will present an impedance to the receiver amplifier that is approximately 4 ohms This speaker com bination can be used with the receiver amplifi
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