User manual CLARION APA1200

[. . . ] The amplifier's range, 250mV to 2. 5V for RCA inputs or 500mV to 5V for speaker level inputs, can accommodate input levels from virtually any brand of source unit. · Bass Boost Control- The amplifier also features a "high-Q" (i. e. It acts much like an equlaizer, with adjustable gain (from 0 to +18dB) fixed at 45Hz. Use this feature to tune lowfrequency audio response to compensate for a less than ideal subwoofer enclosure design. [. . . ] The steep crossover slope keeps midrange tones out of the subwoofer and thereby eliminates an unnatural "nasal" tone quality in the audio system. A filter is activated by sliding the X-Over Mode Switch to either LP or HP. · Input Mode Switch - This switch allows you to set the input mode. Right (bridged) input allows single channel input for bridged operation. This is especially useful in highpowered systems when using one amplifier for each subwoofer/speaker. L + R (sum mono) allows a stereo input to be summed into a mono output. · Speaker Level Inputs - These provide connections for a high-level stereo source. In addition, these connections are provided for installations where the source unit's RCA outputs are unavailable. WARNING:When using the speaker (high-level) inputs, the Black wire must be grounded at the Radio. Failure to do this will result in noise and improper operation. 4 CONNECTIONS FOR POWER AND SPEAKERS The rear panel of the APA1200 and APX400. 2 both contain power and speaker connections as shown below. 25 Amp Fuse / 40 Amp Fuse 5 APPLICATIONS The Clarion APA1200 and APX400. 2 2-channel car audio amplifiers can be used in a variety of system applications. Use a rating that equals the total current consumption at full output of all amplifiers in the system. Adding an external fuse will protect the electrical system from short circuits that can cause a fire. Connect the amplifier's positive (+) lead via a fuse directly to the positive (+) terminal on the battery. 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. When replacing the amplifier 's fuse, always use one having the same current rating. Substituting a higher-rated fuse or a slow-blow type can result in serious damage to the amplifier. Make sure that your vehicle's electrical system (alternator, battery, etc. ) is capable of handling the additional load. If you are planning a multi-amplifier system, you may need to add a second battery and possibly upgrade the alternator with a higher-output rated model. To avoid noise problems, run the amplifier's positive (+) power lead along one side of the vehicle to the battery. Run the remote turn-on wire and RCA audio cables down the center, and route the speaker wires along the remaining side. When creating passage holes for the power wire, use grommets to eliminate any sharp edges created during drilling. [. . . ] Note: If the system uses an equalizer, set its frequency controls to "flat" positions. SETTING THE CROSSOVER The Clarion APA1200 and APX400. 2 feature a fully adjustable crossover. Using the X-Over Mode Switch, select the desired mode - LP for Low Pass, HP for High Pass and OFF for Full Range. If the desired frequency exceeds the range of the Freq (Hz) Control, press the Crossover Frequency Multiplier Switch to increase the value by a multiplier of 10. [. . . ]