User manual CLARION APX-640.4

[. . . ] apx-dpx-update. qxp 8/18/2004 8:46 AM Page 1 APX640. 4/APX640. 2/APX320. 2/DPX1001. 1 Owner/Installation Manual apx-dpx-update. qxp 8/18/2004 8:46 AM Page 2 APX640. 4/640. 2/320. 2/DPX1001. 1 Dear Customer, Congratulations on your purchase of the world's finest brand in the mobile electronic industry. At Clarion we are committed to high-quality music reproduction, and we are confident that you will be pleased with your purchase. Clarion's extensive history in the mobile electronic industry translates into products that are built to the highest of standards. These products provide optimum performance, which we are sure you will enjoy for years to come. [. . . ] This chart gives you a more accurate frequency for each of the forty-one detented positions of the frequency selection control. · Gain Controls with Selectable Input Voltage There are 2 settings for the "Gain" that must be adjusted in order to maximize the power output of the amplifier. The first step is to select the proper input voltage and the second step is to adjust the Gain dial. · Input Voltage Selector A wide range of signal input voltages can be accommodated by the APX320. 2, APX640. 2, APX640. 4 and DPX1001. 1 input section (200mV - 8V). This wide range is split up into three ranges, Figure 2, accessible via switches located in the "Gain" of the amplifier. The "0. 2V-0. 6V" position on the switch selects an input sensitivity range between 200mV and 600mV, the "0. 6V-2V" position on the switch selects an input sensitivity range between 600mV and 2V and the "2V-8V" position on the switch selects an input sensitivity range between 2V and 8V. This means that the "Gain" rotary control will operate within that voltage window. If you are using an aftermarket source unit with RCA outputs, make sure you select the proper voltage selection range. For example, if the RCA voltage of the aftermarket head unit is rated at 4 volts, set the switch at "2V-8V". Figure 3 - Detent Chart 7 CONNECTIONS apx-dpx-update. qxp 8/18/2004 8:46 AM Page 8 APX640. 4/640. 2/320. 2/DPX1001. 1 · Load Selector Please note that when configuring the DPX1001. 1 amplifier, the LOAD SELECTOR switch must be set in the correct position in order for the amplifier to function properly. Please refer to the chart below for specific settings. SUBWOOFER IMPEDANCE LOAD SELECTOR SWITCH SETTING 2-OHM Bridged Load 4~8-OHM Bridged Load 1-OHM Load on each output 2-OHM Load on each output 4 OHM Load on each output 1 OHM 2-4 OHM 1 OHM 2-4 OHM 2-4 OHM · Gain Dial Located next to the input voltage selector, is a rotary control labeled "Gain". Once the appropriate input voltage range has been selected, this rotary control can be used to match the source unit's output voltage to the input stage of the amplifier for maximum clean output. Rotating the control clockwise will result in higher sensitivity (louder for a given input voltage). Rotating the control counter-clockwise will result in lower sensitivity (quieter for a given input voltage). After using this procedure, you can then adjust the level of the amplifier by adjusting the input sensitivity downward, if the amplifier requires attenuation to achieve the desired system balance. Do not increase the "Gain" setting for any amplifier in the system beyond the maximum level. Doing so will result in audible distortion and possible speaker damage. · Bass Boost Control The amplifier also features a "high-Q" (i. e. , narrow frequency band) Bass Boost circuit. It acts much like an equalizer with a switchable gain fixed at 45Hz. Use this feature to tune low-frequency audio response to compensate for a less than ideal subwoofer enclosure design. The added boost produces rich, full bass tones that are normally difficult to reproduce in the car audio environment. NOTE: If Bass Boost is undesired, set Bass Boost to OFF. · X-Over Mode Switches - These switches are equipped with 12dB per octave electronic filters for precise frequency attenuation with minimal phase distortion. [. . . ] Solution Thermal protection circuits are shutting amplifier off: Check location for adequate ventilation; consult an authorized Clarion Audio Dealer. Solution Gain is not set properly, or damaged speaker cones: Review Setting Gain; inspect each speaker cone for signs of damage (i. e. , frozen cone, burning smell, etc. ) TROUBLESHOOTING 16 apx-dpx-update. qxp 8/18/2004 8:52 AM Page 17 Owner's Manual Problem Amplifier fuse keeps blowing. Solution Incorrect wiring or short circuit: Review Installation and check all wiring connections. Problem Whining or ticking noise in the audio with engine on. Solution Amplifier is picking up alternator noise or radiated noise: Turn down input gain and move audio cables away from power wires. [. . . ]