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Mobile Electronic Crossover Network INTERFIRE AUDIO INC. 10110 Santa Fe Springs Road SANTA FE SPRINGS CA90670 USA IF-3X INSTRUCTION MANUAL FERTURES • Extreme Crossover Slope Design • Extreme Bass(Bass Boost) Circuitry • Extreme Electronic Crossover Design • Phase Inverter For Subwoofer Output • Remote Subwoofer Output Level Control • Pulse-Width Modulated( PWM ) Power Supply • Frequency Multiplier For Front Channel • Stereo/Mono Subwoofer Output • Front/Rear/Subwoofer Pre-amp Input and Outputs • 2 High-Pass and 1 Subwoofer Outputs • Mixed Input/Output Switch • Stereo Subwoofer Output With Remote Gain Control • Adjustble 12/18 dB Per Octave Slope Subwoofer • Adjustble 12/18 dB Per Octave Slope High•pass • Adjustble Output Level • Gold Plated RCA Connectors 1 CONTROLS, INDICATION AND TERMINALS CONTROLS, INDICATION AND TERMINALS 1. Power Input Terminal(+12V) 2. Remote Turn-on Input Terminal(REMOTE) 3. Ground Input Terminal(GND) 4. Power Indicator 5. Left/Right Front Channel Signal Inputs 6. Combiner(REAR-IN/MIX)lnput Switch 1. Left/Right Rear Channel Signal Inputs 12 20 8. Left/Right Mixed Line-in/Out Terminals 10 9. Mixed Sub-in/Line-out Switch 13 6 5 21 22 11. Rear Channel High-Pass Frequency Control 12. Front Channel High-Pass Frequency Multiplier Switch 11 13. Front Channel High-Pass Filter Slope Selector 14 7 10. Front Channel High-Pass Frequency Control 23 9 14. Rear Channel High-Pass Fitter Slope Selector 15. Subwooter Frequency Control 24 17 16 16. Bass-Boost Frequency Control 15 17. Bass-Boost Gain Control 8 25 4 19 18 19. Subwoofer Stereo/Mono Switch 26 1 27 18. Phase Inverter Switch 2 3 20. Front Channel Output Gain Control 21. Left/Right Front Channel Output Terminals 22. Rear Channel Output Gain Control 23. Left/Right Rear Channel Output Terminals 24. Subwoofer Output Gain Control 25. Left/Right Subwoofer Output Terminals 26. Subwoofer Channel High-Pass Filter Slope Selector 27. Remote Subwoofer Gain Control Jack 2 3 TROUBLE SHOOTING GUIDE SPECIFICATIONS SYMPTOM PROBABLE CAUSE 1. No power • Check all the ground, B + and remote terminals for tight connection. • Check all fuses • Use a Volt/Ohm meter to check all power wire connections to see the System is receiving + I 2V Power Input : lnput Current : Distortion : Frequency Response : S/N Ratio : Separation : 2. The IF-3X power indicator going off repeatedly when the audio system is on • Check the battery voltage, if low, recharge or replace • Check if the lF-3X has good ground connection with bare metel of the Vehicle chasis 3. The IF-3X heats up quickly even when the audio system is at moderate volume • Check all ground connections of the entire system for good contact with bare metal • Check for speaker short: Disconnect speaker wire from amplifier, test speaker and wire with a Volt/Ohm meter, if there is speaker and metal contact slightiy enlarge the speaker mounting holes, if there is a short in the speaker wiring, replace the entire speaker wire or reinsulate any exposed wire with electrical tape. 4. When the engine is running the audio system has a whining noise that remains unchanged or disappears with the increase of audio volume. • Check all the power wires to see if they are all connected directly to the battary. • Check all the ground connections of the entire system for good contact with bare metal of the vehicle chassis. • Check if the source unit and the IF-3X are grounded at the same reference point. 5. When the engine is running, the audio system has a ~iining noise that increases or decreases with the volume of all program sources (wheather radio, tape or CD) • Install a 10amp in-line filter on the red power wire of the IF-3X If the whining noise persists, check the alternator doides and the voltage regulator. 6. When the engine is running, the audio system has a whining noise that increases or decreases with the tape mode volume ONLY. • This is commonly known as “radiated” noise, it is NOT caused by the IF-3X and thus is beyond the scope of this manual, please contact your local retailer/installer for assistance. 7. Obvoius disforton at low volume • Output level of various channels not compatible, refer to section titled FINAL SYSTEM CHECK. 8. Overall sound effect good, but bass abnormal(more bass at the two extreme settings of the balance control than at the center setting) • The subwoofers are “out-of-phase” with each other, thus canceling the bass when the balance control is at the center position, Check the wiring from the amplifier to the subwoofers (positive “+” to positive “+” and negative “-” to negative “-”) 4 14.4 Volts DC 0.5 Amps Max. 0005% THD at 1V Output Level 10-30 ~Hz°æ1dB >100 dB(A-Weighted) 60 dB Crossover Frequencies Front-High Pass (X1): 50-500 Hz (X10) : 0.5-5 kHz Rear-High Pass : 50-500 Hz Subwoofer-Low Pass : 40-250 Hz Subwoofer-Subsonic : 20 Hz Crossover Slope Rate High Pass : 12/18 dB Per Octave (2nd/3rd Order) Low Pass : 12/18 dB Per Octave (2nd/3rd Order) Bass Boost : Single Octave 0-+12 dB Boost Variable Frequency 70-250Hz Phase-Subwoofer : 0º-180º Input Impedance : 30 kOhms Output Impedance : 100 Ohms Output Gain : 1:1(0 dB) Output Voltage Level : 5 Volts Max. Dimensions: 5 2/10”(W)X1 7/10”(H)x6 5/10”(L) (130x43x 164mm) 5