APX401.4.
APX401.4.qxd 12/5/01 12:58 PM Page 2 4 Channel Power System Amplifier TABLE OF CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input Connections and Audio Controls . . . . . . . . . . . . Connections for Power and Speakers . . . . . . . . . . . . . Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
APX401.4.qxd 12/5/01 12:58 PM Page 3 Owner’s Owner’sManual Manual DESCRIPTION The Clarion APX401.4 4-channel car audio amplifier is an excellent choice for creating a variety of multi-channel sound systems. The amplifier features flexibility of 2, 3 or 4 channel system by a flip of a switch. You can also configure the front or rear amplifier sections for a mixed mode operation to drive a set of satellite speakers and/or subwoofer.
APX401.4.qxd 12/5/01 12:58 PM Page 4 4 Channel Power System Amplifier The Input Connections are gold-plated RCA Jacks and are labeled as FRONT RIGHT, FRONT LEFT, REAR RIGHT and REAR LEFT. The Gain Controls provide a wide adjustment range to accommodate output levels from any brand of source unit. • Gain Controls - Seperate Front and Rear Gain Controls allow you to set the nominal operating level of the amplifier. The amplifier’s range, 250mV to 2.
APX401.4.qxd 12/5/01 12:58 PM Page 5 Owner’s Manual • Rear Channel Input Select - This switch allows the flexibility of using either 2 or 4 inputs to operate the amplifier. • Speaker Level Inputs - These provide connections for a high-level stereo source. These connections are provided for installations when the source unit does not have RCA outputs. WARNING: When using the speaker (high-level) inputs, the Black wire must be grounded at the radio.
APX401.4.qxd 12/5/01 12:58 PM Page 6 4 Channel Power System Amplifier APPLICATIONS The Clarion APX401.4 4-channel car audio amplifier can be used in a variety of system applications. Here are some examples to help plan your own installation. 4-Channel Full-Range Stereo System Figure 3 - In this application, the APX401.4 is used as a 4-channel amplifier to drive four full-range speakers in stereo.
APX401.4.qxd 12/5/01 12:58 PM Page 7 Owner’s Manual 4-Channel Stereo System 2-Channel High-Pass, 2-Channel Low-Pass Figure 4 - In this 4-channel system, the APX401.4 drives a pair of stereo satellites for the front and a pair of subwoofers for the rear. Note the filter settings.
APX401.4.qxd 12/5/01 12:58 PM Page 8 4 Channel Power System Amplifier 2-Channel Stereo System with Low-Pass Bridged Mono Channel Figure 5 - The APX401.4 can also be used to drive a pair of stereo satellites for the front and a single mono subwoofer for the rear. Note the filter settings.
APX401.4.qxd 12/5/01 12:58 PM Page 9 Owner’s Manual 2-Channel High Power System (Satellite or Subwoofer) Figure 6 - The APX401.4 can be set up as a 2-channel high-power amplifier to drive a pair of satellites (or subwoofers).
APX401.4.qxd 12/5/01 12:58 PM Page 10 4 Channel Power System Amplifier Mixed-Mode System On Rear; Full-Range Speakers On Front FREQ (hz) 80 100 125 150 200 L(mH) 8.0 6.4 5.1 4.2 3.2 C(uF) 497 398 NOTE: Chart values based on 4 ohm speakers. Figure 7 - The amplifier can be configured for a mixed-mode operation on either channels 1/2 or 3/4 amplifier sections. The table provides component values to create a 6dB per octave crossover at specified frequencies.
APX401.4.qxd 12/5/01 12:58 PM Page 11 Owner’s Manual INSTALLATION This section lists Mounting and Wiring Precautions prior to installing the Clarion APX401.4. These safeguards provide enough detail to complete an installation successfully. If you do not have the necessary skills, do not attempt to install the amplifier yourself. Instead, see your authorized Clarion dealer for installation recommendations. MOUNTING PRECAUTIONS Although the Clarion APX401.
APX401.4.qxd 12/5/01 12:58 PM Page 12 4 Channel Power System Amplifier 6. Refer to the Figure 8 when making electrical connections. Connect the amplifier’s positive (+) lead via a fuse directly to the positive (+) terminal on the battery. Do not connect this wire to the car’s fuse panel. Use red-insulated 10-gauge (or larger) wire for the amplifier’s positive (+) power lead and the same-gauge black insulated wire for the ground. 7.
APX401.4.qxd 12/5/01 12:58 PM Page 13 Owner’s Manual SETTING THE GAIN After completing the installation, follow these steps to set the Gain Control and then perform the Final System Checks. 1. Turn the Gain Control all the way counter-clockwise. 2. Turn the vehicle’s Ignition Switch to the ON position. Then turn the ON/OFF Switch on the source units to the ON position. Set all Tone or Equalization Controls to “flat” positions and turn Loudness off. 3.
APX401.4.qxd 12/5/01 12:58 PM Page 14 4 Channel Power System Amplifier FINAL SYSTEM CHECKS 1. Start the engine and turn on the source unit. After a two-second delay, slowly increase the Volume Control and listen to the audio. If you hear any noise, static, distortion or no sound at all, check the connections, and also refer to Troubleshooting. Depending on your system design, the levels may become quite loud even at low Volume Control settings.
APX401.4.qxd 12/5/01 12:58 PM Page 15 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; move audio cables away from power wires.
APX401.4.qxd 12/5/01 12:58 PM Page 16 WARRANTY INFORMATION This product is warranted against all defects in material workmanship for a period of one year from the date of original purchase. Clarion ProAudio products except for speakers are covered by a two year warranty when installed by an authorized Clarion dealer. The conditions of this warranty and the extent of responsibility of Clarion Corporation under this warranty are as follows: 1.
