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model
350d
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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 Super-efficient Class D PWM design. Switchable phase invert function. Runs much cooler than conventional Optional remote subwoofer level amp designs. control feature. High-speed MOSFET switching Buffered RCA output jacks for bi- power supply. amp operation. High-current N-channel MOSFET Variable input sensitivity optimizes outputs stable into 2 ohm loads. match with different signal sources. Thermal, DC offset, reverse polarity Gold-plated wire terminals and RCA and short circ
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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 1. R RC CA A O Ou ut tp pu ut t J Ja ac ck ks s - These pass 6. B Ba as ss s E EQ Q S Sw wiit tc ch h - Adds an additional through RCA jacks can be used to 8 db of boost to the subwoofer send a signal to a second amplifier. output when on. 2. R RC CA A IIn np pu ut t J Ja ac ck ks s - Accepts line level 7. S St ta at tu us s L LE ED D - Will light GREEN to outputs from head units or signal indicate the amplifier is on and processors at voltages between ope
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REAR PANEL CONNECTIONS S Su ub b O Ou ut t T Te errm miin na alls s 1. - Connect the the remote turn on lead of the head speakers to these terminals. (Refer unit or signal source. If a (+) 12 to the Speaker Connection section volt remote turn lead is not avail- of this guide.) able, a Remote Power Adapter (P/N #55000) can be used to 2. P Po ow we err F Fu us se e -- This fuse protects the supply a remote turn on signal. DO amplifier against internal electrical NOT connect this terminal to d
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SPEAKER WIRING DIAGRAMS Single subwoofer connection (top view) Two subwoofer connection (top view) N NO OT TE E:: The dual + and -- sub-out terminals of the 350d are paralleled internally and the combined load impedance should be taken into consideration when connecting multiple subwoofers. 9 © 2003 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. Because this amplifier is only designed for subwoofer applications, the low-pass crossover is active at all times. The crossover point is adjustable to allow more precise system operation. Try and keep the setting low enough to prevent image smearing (you should not be able to hear male voic
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SPECIFICATIONS Directed model 350d RMS continuous power driven into 4 ohms 150 watts from 20 to 250 Hz with less than 0.4% Total Harmonic Distortion @ 14.4 VDC RMS continuous power driven into 2 ohms 250 watts from 20 to 250Hz with less than 0.6% Total Harmonic Distortion @ 14.4 VDC Dynamic power rating (IHF-202 Standard) at 350 watts minimum load Signal-to-Noise Ratio Greater than 80 dB Frequency Response 20-200 Hz +0, -1 dB Damping Factor 50 (typical) Crossover Low-pass 12 dB/ octave vari
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The company behind this system is Directed Electronics, Inc. Since its inception, Directed has had one purpose, to provide customers with the finest vehicle security, car stereo products, rear seat entertainment, and accessories available. The recipient of more than 20 patents in the field of advanced electronic technology, Directed is ISO 9001 registered. Directed Electronics, Inc. Vista, California 92081 Directed® is committed to delivering world-class quality products and services that excit
