D E C A DA6502, D DA3504, E TM AMPLIFIERS DA4002, DA1002 G E N U IN E JB L Amplifier Features · 4-, 3- or 2-channel operation (DA3504) 2- or 1-channel operation (DA4002, DA6502, DA1002) · Simultaneous stereo and mono operation · Built-in 12dB/oct electronic crossover · Oversized Floating Rail Mosfet Power Supply · Floating Ground Factory-Head-Unit Speaker-Level Input · Variable input sensitivity (250mV-4V) · Fully complementary output stage with Class-A voltage amplification · Gold-plated power, input and output connectors · 2-Ohm stable (stereo) · Power-on indicator badge Important: Installation of automotive stereo components can require extensive experience in performing a variety of electrical and mechanical procedures. Although these instructions explain how to install a JBL Decade power amplifier in a general sense, they do not show the exact installation methods for your particular vehicle. If you do not have the experience, do not attempt the installation yourself; instead ask your Authorized JBL Car-Audio Dealer about professional installation options. Thank you for purchasing your new JBL DecadeTM Series power amplifier. Decade Series power amplifiers feature the latest advances in discrete circuit topology ensuring low distortion and superbly clean and clear sound quality. In addition to RCA-type pre-amp inputs, Decade Series amplifiers feature Floating Ground Factory-Head-Unit InterfaceTM , designed to facilitate integration with factory-installed audio systems for distortion-free performance. All JBL Decade Series power amplifiers feature built-in electronic crossovers for easy system expansion without additional outboard processors. Installation Precautions and Notes · The JBL Decade Power amplifiers have five levels of circuit protection that monitor the amplifier and will shut it down if the electrical system voltage drops below 5Vdc or exceeds 18Vdc, temperatures are above 194° F (90° C), short circuits occur or current draw exceeds product specifications. For best performance, check the intended mounting site to make sure the operating environment does not create conditions that will trigger circuit protection. About This Manual To attain maximum amplifier performance, we encourage you to read the remaining pages before installing and operating your new JBL Decade power amplifier. Especially review the Applications section for ideas on designing and expanding your system. Also, save these instructions for future reference. · Prior to installation, turn off all audio systems and other electrical devices. Also disconnect the (­) negative lead from the vehicle's battery. · At the installation site, locate and make a note of all fuel lines, hydraulic brake lines and electrical wiring. Use extreme caution when cutting or drilling in and around these areas. · Check clearances on both sides of a planned mounting surface before drilling any holes or installing any screws. Remember that mounting screws can extend behind the mounting surface. · Always wear protective eyewear when using tools. · When routing cables, keep input signal cables away from power cables and speaker wires. · When making connections, make sure that each connection is clean, insulated, and properly secured. Observe the polarity markings on the rear panel. Refer to the application drawings to set up the amplifier for operation in stereo, bridged-mono, bi-amp or tri-mode configurations. · If the amplifier's fuse must be replaced, use only the same rating and type as a replacement. Do not substitute another kind. 2 2 1 7 9 8 6 8 6 SPEAKER INPUT SPEAKER INPUT L L LINE INPUT R OFF +6dB 1 10 INPUT MODE LINE INPUT R + ­ R+ R INPUT LEVEL BASS EQ CROSSOVER + ­ L + ­ MONO STEREO R INPUT LEVEL BASS EQ CROSS OVER CROSS OVER BASS EQ INPUT LEVEL LINE INPUT R INPUT MODE SPEAKER INPUT ­ ­ STEREO MONO L L + ­ R ­ OFF +6dB 1 10 LPF FLAT HPF L LPF HPF FLAT LPF HPF OFF +6dB 1 FLAT 10 L 2 5 3 4 1 3 7 9 7 5 4 1 2 ­ BRIDGED + REM GND(­) BATT(+) FUSE 20 + 20 AMP LEFT ­ ­ REAR + BRIDGED ­ RIGHT + + LEFT ­ ­ FRONT + BRIDGED ­ RIGHT + POWER REM GND(­) BATT(+) FUSE 30 AMP + LEFT ­ ­ RIGHT + POWER SPEAKER OUTPUT SPEAKER OUTPUT DA4002/DA6502 DA3504 2 Controls and Connectors 1. Pre-amp Line Level Input Connector ­ Connects to line-level output from the source unit. 2. Floating Ground Factory-Head-Unit Interface Speaker Input ­ Connects to speaker level output from the source unit (2-channel on DA4002, DA6502, DA1002; 2 separate 2-channel connectors on DA3504). 3. Speaker-Output Connector ­ 2-channel on DA4002, DA6502 and DA1002; 4channel on DA3504. 4. Fuse ­ DA4002: 15A ATC, DA6502: 20A ATC, DA1002 2x 20A ATC, DA3504: 30A ATC. 5. Power Connector ­ Connection for 12V+, Gnd and Rem in. 6. Input-Mode Switch ­ Sums left and right inputs. 7. Input-Level Control ­ Adjusts input sensitivity for pre-amp level and speaker level inputs. 8. Crossover Selector ­ Determines whether the crossover is a High-Pass filter @120Hz (HP), a Low-Pass filter @120Hz (LP) or unfiltered (FLAT). Lowpass filter frequency selector (DA1002). 9. Bass E.Q. ­ Enables bass boost +6dB @ 50Hz. 1 7 30 9 8 SPEAKER INPUT LINE INPUT L L INPUT LEVEL BASS EQ + ­ R+ R­ R OFF +6dB LOW PASS FILTER + ­ L + ­ R 1 10 OFF 70Hz 100Hz L 3 5 20 AMP SPEAKER OUTPUT ­ BRIDGED + ­ RIGHT + ­ POWER REM GND(­) BATT(+) 4 FUSE 20 AMP 20 AMP + LEFT 20 DA1002 20 3 Wiring the Speaker Output Connections 1. Connect the speakers, observing proper polarity, to the speaker output barrier strip on the amplifier using at least 16G high-quality speaker wire. (Note: The total impedance of the speakers connected to the outputs when the amp is driven in stereo must be at least 2 ohms.) 2. If you are bridging the amplifier, connect the speaker wires to the terminals marked "bridge" observing proper , polarity. (Note: The total impedance of the speaker system to be connected to the amplifier must be at least 4 ohms in bridge mode.) 3. If you are running the amp in Tri-Mode (stereo and mono simultaneously to one or two pairs of satellite speakers and a subwoofer), refer to the chart below to determine the capacitor and inductor values you'll need to route bass signals to the woofer, and midrange and high frequencies to the satellite speakers. These passive crossover components will also ensure that the impedance of the speaker system doesn't drop below 2 ohms. FREQUENCY Crossover 75Hz 100Hz 125Hz 150Hz 175Hz 200Hz INDUCTOR 6dB/oct. LP (4 ohm) 8.0mH 6.4mH 5.0mH 4.2mH 3.6mH 3.2mH CAPACITOR 6dB/oct. HP (4 ohm) 530µF 400µF 318µF 265µF 227µF 198µF Mounting the Amplifier The JBL Decade Series amplifiers can be mounted in virtually any location inside the vehicle. However, make sure to keep the amplifier away from heater vents or ducts. 1. At the chosen site, use the amplifier as a mounting template and mark the locations of the four mounting holes. 2. Drill a small pilot hole at each marked location. 3. Mount the amplifier and securely tighten the mounting screws. Wiring the Power Connections Refer to diagrams on page 3 for connector locations. 1. For power, remote and speaker wires, strip 1/4" off one end of each jacket to reveal bare wire for insertion into the barrier strip connectors. 2. Locate the 3-connection barrier strip labeled +Batt, Rem and Gnd. Connect a black wire (at least 12G for DA4002, 10G for DA6502, DA1002 and DA3504) to the Gnd terminal and connect the other end to the nearest bare-metal chassis component. Then, connect a red wire (at least 12G for DA4002, 10G for DA6502, DA1002 and DA3504) from the vehicle's +12-volt battery terminal to the +Batt terminal on the barrier strip. Finally connect a blue wire (16G) to the Rem terminal on the barrier strip and connect the other end to the Rem output of the source unit. Wiring the Input Connections 1. If you are using conventional RCA input connections and a source unit with output voltage less than 4V, simply plug the RCA plugs into the RCA jacks on the amplifier. 2. If you are connecting the amplifier to a factory-installed source unit, or to a source unit that only has speaker-level outputs, connect the speaker outputs of the source to the speaker input plug on the amp using the connector provided. 4 Observe the following color-codes: Left+: White Left­: White with black stripe Right+: Gray Right­: Gray with black stripe 4. If you are connecting your Decade Series amplifier to a source unit with output voltage higher than 4V, connect the output signal wires of the source unit to the floating ground factory head unit inputs. Because the inputs have an impedance of 100K ohms, this connection will provide the best noise-free performance possible. System Setup and Adjustment Electronic Crossover The electronic crossover(s) in your Decade Series amplifier can be selected as a 12dB/oct. high-pass filter at 120Hz (HPF), a 12dB/oct. low-pass filter at 80Hz (LPF) or it can be defeated (FLAT). Setting Input Sensitivity Proper input sensitivity control settings on Decade Series power amplifiers are critical to ensure optimum performance, low noise levels and maximum system reliability. As a general rule, controls at the front end of a system (source, equalizers and other processors) should be set as high as possible with the amplifier input sensitivity set as low as possible while still providing adequate volume levels. Using a high signal level and a low sensitivity setting will help keep background noise in the system to a minimum. Initially, turn the input sensitivity GAIN control to its minimum (counter-clockwise) position. 1. Reconnect the (­) negative lead to your vehicle's battery. Apply power to the audio system and play a favorite music track from a CD or tape. (Note: After the source unit is on, the JBL badge (on the top panel) will illuminate, indicating the amplifier is on. If not, check the wiring, especially the remote connection from the source unit. Also refer to "Troubleshooting" on page 7.) 2. On the source unit, increase the volume control until it is approximately 3/4 of its maximum output level. Slowly increase the Input Sensitivity control (clockwise) toward three o' clock and, at the same time, listen to the quality of the reproduced sound. At some point, you'll hear distortion on the music peaks. Stop the adjustment and turn it back slightly. This is the maximum undistorted output level of your system, and should not be exceeded during use. 3. After adjusting the level of the main speakers in your system, you should adjust the remaining channels (if you are using a DA3504 or a multi-amp system) for the desired system balance. You'll find this easiest to do by adjusting the channels in the following order: 1) front speakers, 2) rear speakers, 3) subwoofer. Elaborate, multichannel systems may be too complex to adjust. Your local JBL installation specialist is the best person to help with such adjustments. 5 Figure 1 ­ BRIDGED + REM GND(­) BATT(+) FUSE L L SPEAKER INPUT LINE INPUT R + ­ R+ R INPUT LEVEL BASS EQ CROSSOVER ­ 15 15 AMP 1 10 OFF +6dB L LPF FLAT HPF + LEFT ­ ­ RIGHT + POWER SPEAKER OUTPUT Figure 2 Applications For your convenience, we've included several application diagrams to help you plan your own system installation. Figures 1 through 4 show how to configure the Decade Series power amplifiers for stereo, bridged-mono and tri-mode operation. Figure 3 (Note: For simplicity, figures do not show power, remote and input connections.) Figure 1. This wiring diagram shows a DA4002, DA6502 amplifier set to stereo to drive a pair of full-range speakers. Figure 2. This wiring diagram shows a DA1002 amplifier set to bridge mode (mono) to drive a single subwoofer. Figure 3. This wiring diagram shows a DA4002, DA6502 amplifier set for trimode operation. For a desired crossover frequency, use the chart on page 4 to select an inductor for the subwoofer, and corresponding capacitors for left and right speakers. Figure 4. This wiring diagram shows a DA3504 set to drive a pair of 5-1/4" 2-way speakers with the two front channels, and the rear channels set to drive a single subwoofer in bridge mode. 20 AMP ­ + LEFT ­ SPEAKER OUTPUT + BRIDGED ­ RIGHT + POWER REM GND(­) BATT(+) FUSE 20 AMP 20 AMP SPEAKER INPUT LINE INPUT L L INPUT LEVEL BASS EQ + ­ R+ R­ R OFF +6dB LOW PASS FILTER 20 20 + ­ L + ­ R 1 10 OFF 70Hz 100Hz L SPEAKER INPUT LINE INPUT ­ BRIDGED + REM GND(­) BATT(+) FUSE L L + ­ R+ R­ R INPUT LEVEL BASS EQ CROSS OVER 20 20 AMP L OFF +6dB 1 10 LPF FLAT HPF + LEFT ­ ­ RIGHT + POWER SPEAKER OUTPUT Figure 4 ­ + LEFT ­ REAR + BRIDGED ­ RIGHT + ­ + LEFT ­ FRONT + BRIDGED ­ RIGHT + POWER REM GND(­) BATT(+) FUSE 30 AMP SPEAKER INPUT INPUT MODE LINE INPUT R + ­ L + ­ MONO STEREO L R INPUT LEVEL BASS EQ CROSS OVER CROSS ...