G SERIES LOUDSPEAKERS SERVICE Should your subwoofer ever need service, return it to the JBL dealer from whom it was purchased. If for some reason this is impractical, in the USA, call 800-336-4JBL for the nearest warranty station. Do not return products to the JBL factory without prior authorization. Specifications Amplifier Power (RMS)* Low Frequency Woofer Voice Coil Diameter Cone Material Inputs Outputs Crossover Frequency Frequency Response (­6dB) External Dimensions (HxWxD) External Dimensions (mm) Weight (each) Shipping Weight *ALC circuit defeated. **Determined by crossover setting. G SUB10 80 Watts 10" 2" Poly-fiber Laminate Line Level & Speaker Level Full-Range Speaker 50­200 Hz (Continuously Variable) 30 Hz to (62­250 Hz)** 17-1/4" x 13-1/4" x 14-1/4" 438 x 337 x 362mm 35 lbs (15.9kg) 40 lbs (18.1kg) 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 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 Blvd. Northridge, CA 91329 800 336 4JBL (4525) A Harman International Company Part No. JGS10OWN INTRODUCTION Congratulations on choosing JBL loudspeakers. Their highly accurate, uncolored and balanced sound character will greatly increase your enjoyment of recorded music. We build JBL speakers with careful attention to detail, using only the highest quality materials. They will provide many years of excellent performance. Your G Sub10 is easy to set up. We recommend that you take a few minutes to read this owner's manual before you begin, and that you follow instructions carefully. Amplified Subwoofer Your G Sub10 subwoofer has both line-level and speaker-level stereo inputs for versatility and ease of use. We've also provided speaker outputs to let you hook up satellite speakers. Adjustable level and crossover controls let you balance the subwoofer with your main speakers. Poly-fiber Laminate Woofer Provides tight bass and well-defined sound reproduction without harshness, stridency, or listener fatigue. Acoustically Optimized Cabinet Optimized to produce an extended and level bass response in conjunction with the internal amplifier. The cabinet may be placed either vertically or horizontally. The grille logo may be turned to match either orientation of the subwoofer. G SERIES LOUDSPEAKERS OWNER'S MANUAL SUB10 G CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: To reduce the risk of electric shock, do not remove amplifier back. No user serviceable parts inside. Refer servicing to qualified service personnel. The lightning flash with arrowhead symbol, within equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. Warning ­ To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture. Caution: To prevent electric shock do not use this (polarized) plug with an extension cord, receptacle or other outlet unless the blade can be fully inserted to prevent blade exposure. CONNECTIONS CAUTION: Before making any connections to your subwoofer, make sure the power to your entire system is OFF. POWER Plug the power cord into a grounded wall outlet or the accessory outlet on the back of your amplifier/receiver. INPUTS Your G Sub10 subwoofer has both line-level and speaker-level input connections. Review your receiver/TV/source amplifier instruction manual to see which outputs your equipment provides, then follow the appropriate instructions below. Line Input ­ Use the RCA (phono) input jacks labeled "Line Input" when connecting from a line-level device, such as a pre-amp, crossover, signal processor, or when using any of the line-level outputs on the rear of your receiver/TV/source amplifier. If your receiver has a single RCA output for sending the signal to the subwoofer, you may connect it to both Right & Left input jacks by using a "Y" adapter (not included). Many stereo/ large screen TVs have stereo (Right & Left) 2 RCA jacks for sending the signal to external audio equipment. Your subwoofer connects to these using both the Right & Left input jacks (see Figure 1). Speaker Level Input (from amplifier) ­ Use these inputs when connecting to the "Speaker Out" (speaker mains) of the receiver/ TV/source amplifier. Run speaker wires from the speaker output terminals (usually coded red and black) on the rear of the receiver/TV/source amplifier to the red and black input terminals labeled "Speaker Level Input (from amplifier)" on the subwoofer (see Figure 2). Preparing the Hookup Wire Your JBL dealer can recommend suitable cables, or you can buy wire at most hardware or electronic stores. High-quality connectors and cable offer consistent performance that does not deteriorate over time. We recommend #16 AWG two-conductor insulated wire as a minimum size. If your subwoofer is more than 30 feet (10m) from your receiver/TV/source amplifier, use larger diameter, lower gauge wire. G SERIES LOUDSPEAKERS + R ­ ­ L+ Receiver or Amplifier Subwoofer or Line Output R L RCA Phono Cables Speaker Level Input (from amplifier) + R ­ ­ L + Line Input L Level Phase Crossover Freq Reverse Normal R Min Max 50 (Hz) 200 + R ­ ­ L + Speaker Level Output (to external speakers) G Sub10 Subwoofer Figure 1: Line-Level Input Connection 1. First determine the distance between the receiver/TV/source amplifier and your subwoofer. 2. Now make two hookup wires this length. 3. Strip off 3/8" of insulation from both ends of each conductor wire. 4. Twist each set of thin wires into a tightly-bunched spiral. 5. Now find a visual difference 3 between the two conductors of each molded pair of speaker wire. These differences 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 doesn't matter which of the two strands of wire go to (+) and (­) on the receiver/TV/source + R ­ ­ L+ Receiver or Amplifier Subwoofer or Line Output R L Speaker Wire + Speaker Level Input (from amplifier) R ­ ­ L + Line Input L Level Phase Crossover Freq Reverse Normal R + R ­ ­ L + Min Max 50 (Hz) 200 Speaker Level Output (to external speakers) G Sub10 Subwoofer Figure 2: Speaker- Level Input Connection amplifier and G Sub10 subwoofer, just be sure to connect both left and right hookup wires identically. Push down on the button next to the terminal hole and insert the wire through the hole. For each channel, connect the red terminal on the receiver/TV/source amplifier to the red or (+) "Speaker Level Input" connection terminal on the G Sub10 subwoofer, and the black to the black or (­). Connecting the subwoofer in this manner ensures 4 that both channels will be in phase; that is, working together, not in opposition. CAUTION: Never attach inputs to both line-level and speaker-level inputs of the same channel at the same time. OUTPUTS Your subwoofer has a speaker output terminal block to enable the signal to G SERIES LOUDSPEAKERS be sent to your main speakers or satellites. Your G Sub10 subwoofer can use the signal from your receiver/TV/source amplifier to produce the low bass while passing the unaltered signal source to the external speakers. Speaker Level Output (to external speakers) ­ Hook up the external speakers using two-conductor insulated wire using the same procedure as described in "Speaker Level Input" section. The red (+) terminal of the subwoofer should be connected to the red (+) terminal of the external speaker, and the black (­) to black. Connecting the external speakers in this manner ensures that they will be in phase; that is, work together rather than in opposition. Connecting the speakers out of phase will not damage them, but will result in less bass and poor imaging (see Figure. 3). NOTE: There is no significant change in impedance loading to your receiver/TV/source amplifier when hooking up through the G Sub10 subwoofer. reproduce. It allows a seamless transition from subwoofer to satellite speakers. When using small satellite speakers (without much bass), you would want the crossover frequency more toward the upper end (200 Hz) to fill in the sound your satellites can't reproduce. When using larger main speakers, a setting more toward the low (50 Hz) end gives a smoother transition from your subwoofer to your main speakers. Experiment until you find a setting that meets your satisfaction. MULTICOLOR LED INDICATOR OPERATION The LED on the rear amp plate signifies the following operation states of the G Sub10 subwoofer: RED ­ When your subwoofer isn't receiving a music or source signal and the power switch is turned on, the LED indicator turns RED telling you that the unit is plugged in and ready for operation. At this time, the amplifier is in a "Standby" mode, effectively turned off and waiting for a signal from the source amplifier. GREEN ­ When your subwoofer, picks up a source signal, it turns on instantly and begins to play. The LED turns GREEN. After about 6 to 8 minutes of non-use (no signal being received), your subwoofer goes into the auto shut-off mode. The LED turns RED to signify this "Standby" condition. NOTE: When the amplifier is in the "Standby" mode it is effectively turned off. The Red LED tells you that the subwoofer is plugged into the AC wall power with its power switch turned on, but the amplifier circuitry is not engaged. You do not have to reach to the back panel and turn the power switch off after every use. Your G Sub10 subwoofer turns itself off internally. For extended periods of non-use (i.e., vacations, etc.), you may wish to actually turn the subwoofer off using the power switch. 5 LEVEL NOTE: When first setting up your subwoofer, set the Level control counterclockwise to "Min" (minimum) before turning power switch ON. Turn power switch to "On," and use the "Level" knob to add the appropriate amount of bass to your main speaker output. Increase the subwoofer level by turning the level knob clockwise until you find a setting that is pleasing to you. CROSSOVER FREQUENCY Use the "Crossover Freq" knob to adjust the upper end of the subwoofer's frequency response. The crossover control determines the highest frequency your subwoofer will + R ­ ­ L+ Receiver or Amplifier Subwoofer or Line Output R L Speaker Wire Speaker Level Input (from amplifier) + R ­ ­ L + Line Input L Level Phase Crossover Freq Reverse Normal R + R ­ ­ L + Min Max 50 (Hz) 200 Speaker Level Output (to external speakers) G Sub10 Subwoofer Speaker Wire ­ + External Speakers ­ + Figure 3: Speaker-Level Output Connection 6 G SERIES LOUDSPEAKERS PLACEMENT CAUTION: Do not place your subwoofer next to heaters, furnaces, or any other heat sources. Be sure not to pinch or compress the power cord. Since the low frequencies produced by your subwoofer are relatively nondirectional, the placement of your subwoofer is not critical. You may place it under an end table, next to the wall, near the TV, anywhere you would like. Use the PHASE switch to maintain proper acoustic summation with the main speakers. Listen to your G Sub10 subwoofer and main speakers with the switch on "Normal" then listen to the same material with the switch on "Reverse." Decide which way sounds better and leave the switch in this position. You should repeat this procedure if you move your subwoofer to another part of the room. any cleaners or solvents on the speaker drivers themselves. TROUBLESHOOTING Your subwoofer can only be repaired by an authorized JBL repair station. Do not remove the amplifier from the cabinet. There are no user-serviceable parts inside. Before seeking service for your subwoofer, please recheck all connections as outlined in this manual. Verify the AC wall power source is working properly by checking it with another appliance. The Red LED light on rear panel does not light when power switch is on 1. The subwoofer may not be receiving power. Make sure wall AC source is working properly. The Red LED light is on but does not turn to Green 1. Your subwoofer may not be receiving a signal. Your stereo sound source may not be turned on or may not be selected on the front panel of the receiver/amplifier. Check settings. The subwoofer plays at low volumes and/or sh ...