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OWNER’S
MANUAL
A502
models
A404
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CONGRATULATIONS Congratulations for choosing a Directed enthusiast with years of high-quality Audio power amplifier from Directed audio reproduction. Electronics, the industry leader in high Directed Audio power amplifiers come quality automotive security and audio with a two-year limited warranty if equipment since 1990. installed by an authorized Directed Directed Audio power amplifiers dealer. If not installed by an authorized continue to set new standards of perfor- dealer, Directed Audio po
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LIMITED TWO-YEAR CONSUMER WARRANTY Directed Electronics, Inc. promises to the WARRANTY OF NON-INFRINGEMENT OF original purchaser, to replace this product INTELLECTUAL PROPERTY ARE EXPRESSLY should it prove to be defective in workman- EXCLUDED TO THE MAXIMUM EXTENT ship or material under normal use, for a ALLOWED BY LAW, AND DIRECTED period of two years from the date of NEITHER ASSUMES NOR AUTHORIZES purchase by the dealer as indicated by the ANY PERSON TO ASSUME FOR IT ANY date code marking of t
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FEATURES High-speed MOSFET switching Variable input sensitivity optimizes power supply and complimentary match with different signal sources. bipolar outputs. Chrome-plated wire terminals and Stereo, mono, or simultaneous RCA connectors ensure maximum stereo/mono operation. signal transfer. Thermal, DC offset, reverse polarity. Rugged two-piece extruded heat sink and cover. Selectable 12dB/octave two-way crossover. Unity gain pass-through RCA jacks. Switchable 8 dB bass EQ function. WAR
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INSTALLATION GUIDELINES 1. Please read this owner’s manual terminal. Use a fuse or circuit carefully before installing this ampli- breaker rated slightly more than the fier. on-board fuse(s) of the amplifier(s). The gauge of power 2. Disconnect the battery ground wire used should take into account terminal prior to making any elec- the total current draw of the trical connections. system, and the length of wire used. IASCA and other auto sound 3. Check for any hazards or obstruc- competition or
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speaker load, the more heat is 10. Due to the high-frequency MOSFET generated. For low impedance switching power supply, filtering the speaker applications or restricted power cable is not generally ventilation installations, an external required (remember that the amp cooling fan may be advisable. can’t deliver full output if the power supply is restricted). Proper 9. Battery and ground connections to grounding of the signal source is the vehicle should be made with mandatory for the amplifier
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FRONT PANEL CONNECTIONS/CONTROLS A502-A404 1. R RC CA A IIn np pu ut t J Ja ac ck ks s -- Accepts line level frequencies and is used for subwoofers speakers. outputs from head units or signal processors at voltages between B Ba as ss s E EQ Q S Sw wiit tc ch h 5. - Adds an additional 150mV and 7.5 volts. 8 db of boost to the speaker output when on. 2. R RC CA A O Ou ut tp pu ut t J Ja ac ck ks s -- These pass through RCA jacks can be used to 6. L Liig gh ht t B Ba arr/ /F Fa an n - A
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FIGURE 2—AMPLIFIER CONNECTIONS A404 FRONT 2 1 4 5 6 8 3 7 FIGURE 5—LED/FAN HARNESS BLACK - TO LEDs BLUE + BLACK - TO FAN RED + REAR PANEL CONNECTIONS 1. P Po ow we err F Fu us se e -- This fuse protects the 3. R Re em mo ot te e T Tu urrn n O On n - This terminal amplifier against internal electrical turns on the amplifier when (+) 12 damage and is meant to protect the volt is applied to it. Connect it to amplifier only. All other power the remote turn on lead of the head connections should
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S Sp pe ea ak ke err T Te errm miin na alls s wire. DO NOT connect this terminal 5. - Connect the directly to the vehicle battery speakers to these terminals. (Refer ground terminal or any other to the Wiring Diagram section of factory ground points. this guide.) FIGURE 3—AMPLIFIER CONNECTIONS A502 REAR 2 4 5 1 3 FIGURE 4—AMPLIFIER CONNECTIONS A404 REAR 2 4 5 1 3 9 9 © 2004 Directed Electronics, Inc
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SPEAKER WIRING DIAGRAMS A502 Stereo operation (top view) L CH R CH Mono operation (top view) B L CH R I D G E R CH D Simultaneous stereo/mono operation (top view) INDUCTOR CAP B L CH SUB R I D G CAP E R CH D 1 10 0 © 2004 Directed Electronics, Inc
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SPEAKER WIRING DIAGRAMS A404 Stereo Operation - 2 Channel (top view) B L CH R I FRONT D (RIGHT) G E R CH D B L CH R I REAR D (LEFT) G E R CH D N NO OT TE E:: For bridged two channel operation as shown in this diagram, connect right channel RCA cables to the front inputs of the amplifier, and left channel RCA cables to the rear inputs of the amplifier. For summed subwoofer applications, connect RCA cables per the input jack marking. 1 11 1 © 2004 Directed Electronics, Inc
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Stereo Operation - 4 Channel (top view) FRONT B L CH (LEFT) R I D G E FRONT R CH (RIGHT) D REAR B L CH (LEFT) R I D G E REAR R CH D (RIGHT) Simultaneous Stereo (top view) INDUCTOR CAP B L CH SUB R I FRONT D G CAP E R CH D INDUCTOR CAP B L CH SUB R I REAR D G CAP E R CH D 1 12 2 © 2004 Directed Electronics, Inc
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2 Channel Stereo with Mono Sub (top view) B SUB L CH R I D G E R CH D REAR B L CH (LEFT) R I D G E REAR R CH D (RIGHT) 1 13 3 © 2004 Directed Electronics, Inc
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CROSSOVER SETTINGS AND GAIN ADJUSTMENT Your Directed Audio power amplifier needs to be adjusted carefully to achieve maximum performance. These are some guidelines to follow when fine-tuning the amplifier. For full-range and simultaneous stereo/mono bass applications, the crossover selection switch should be set to FLAT. If the amplifier is driving your subwoofers, set the switch to LPF, and for mid-bass/midrange output, set to HPF. The gain adjustment allows you to set proper signal match for
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LED TUBE INSTALLATION (OPTIONAL) This Directed Audio amplifier has been designed with a custom heat sink that can accommodate two (optional—not supplied) VARAD LED tubes. 1. Before installing the LED tubes, remove and discard the mounting feet from the VARAD LED tubes. 2. Slide each LED tube assembly into your Directed Audio amplifier heat sink. Ensure that the LEDs are facing out for optimal visibility. The wires from the LED tube assembly should be on the signal input end of the amplifier. The
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CEA SPECIFICATIONS A A5 50 02 2 Power Output: 90 Watts RMS x 2 at 4 ohms and < 1% THD+N Signal to Noise Ratio: -70 dBA (reference 1 Watt into 4 ohms) Additional Power: 125 Watts RMS x 2 at 2 ohm and < 1% THD+N A A4 40 04 4 Power Output: 45 Watts RMS x 4 at 4 ohms and < 1% THD+N Signal to Noise Ratio: -80 dBA (reference 1 Watt into 4 ohms) Additional Power: 50 Watts RMS x 4 at 2 ohm and < 1% THD+N 1 16 6 © 2004 Directed Electronics, Inc
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SPECIFICATIONS A A5 50 02 2 A A4 40 04 4 RMS continuous 75W x 2 35W x 4 1 Power 4 Ohm RMS continuous 125W x 2 50W x 4 2 Power 2 Ohm RMS continuous Power 250W x 1 100W x 2 3 Bridged 4 Ohm Dynamic Power Rating 200W 300W (IHF-202 Standard) 4 Ohms Signal-to-Noise Ratio Greater than 90 dB Greater than 90 dB Frequency Response 20-20,000 Hz ± 0.25 dB 20-20,000 Hz ± 0.25 dB Damping Factor Greater than 100 Greater than 100 Switchable high or low pass Switchable high or low pass Crossover 12 dB/octave,
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Directed Electronics, Inc. The company behind this system is Directed Electronics, Inc. Since its inception, Directed has had one purpose, to provide customers with the finest Vista, California 92081 vehicle security, car stereo products, rear seat entertainment, and accessories avail- www.directed.com able. The recipient of more than 20 patents in the field of advanced electronic tech- nology, Directed is ISO 9001 registered. Directed® is committed to delivering world-class quality products an
