User manual DEI A802

[. . . ] OWNER'S MANUAL A802 A1004 models D2205 CONGRATULATIONS Congratulations for choosing a Directed Audio power amplifier from Directed Electronics, the industry leader in high quality automotive security and audio equipment since 1990. Directed Audio power amplifiers continue to set new standards of performance, reliability, and affordability in the mobile electronics industry. Featuring high-efficiency MOSFET power supplies, flexible on-board crossovers, and state of the art audio design, Directed Audio power amplifiers will excite and delight the mobile sound enthusiast with years of high-quality audio reproduction. Directed Audio power amplifiers come with a two-year limited warranty if installed by an authorized Directed dealer. [. . . ] All other power connections should be fused at the source. The A802 uses 2-30A fuse, the A1004 uses 2-40A fuses, and the D2205 uses 3-40A fuses. For the Alarm to Amplifier, the Transmit and Receive wires must cross from one end to the other. Bitwriter® commands can control parameters such as Turn on Delay, Fan Control, Input Gain adjustment, and also place the amplifier into a monitoring state for commands from an ESP2 equipped alarm. Turn-On Delay - 0. 75, 1. 00, 1. 25, 1. 75, 2. 25, 2. 75, or 3. 25 seconds. 1. 75 seconds is the factory default setting. Fan Control - AUTO - The fan will automatically turn on when the internal temperature exceeds approximately 40 deg C. The ON option causes the fan to operate whenever the Amplifier is on. Use the ON option if you are using the external FAN port to drive optional LED tubes. In the OFF mode the external FAN port is disabled. Service Code Display - The Directed ESP® Engine stores up to seven previous faults for later replay. The Service Code Display allows the installer to step through the fault history. - OFF - In the OFF position, the amplifier operates normally. - FLASH CODE ON LED - the last recorded fault is "replayed" on the ESP® Indicator LED. If the unit has never recorded a fault, the ESP® Status indicator will not flash. - RESERVED - no function, reserved for future use. - CLEAR LAST FAULT - Clears the last fault. Note that this allows you to see previous faults prior by backstepping one at a time through the fault history. Input Gain Range - The sensitivity on the gain control can be limited to specific ranges. The DEFAULT position allows adjustment over the full range of amplifier sensitivities. There are 4 other ranges 0. 5-1. 0V, 1. 0V-2. 0V, 2. 0-4. 0V, 4. 0-8. 0V. Input Gain Adjustment - In the LOCK position, the gain range and gain control can be locked out to prevent accidental mis-adjustment. [. . . ] If you hear distortion before you reach the 3/4 volume setting of your head unit, reduce the gain setting on the amplifier and start to raise the head unit volume again. When you can listen to the music at or slightly above 3/4 on your head unit without audible distortion, slowly raise the gain of the amplifier until distortion is heard, then back off the gain until the distortion is not audible. This setting will allow you to reach full output with all but the quietest of source material, while avoiding excessive noise in the system. Note: Remember that the Directed ESP® amplifiers use a digital gain control with a finite number of adjustment steps. A very small adjustment may not cause any audible change in level. The same procedure should be used for adjusting the amplifier when the on board crossover is set to LOW or HIGH, but you will also have to take into consideration the effect that gain adjustment has on system frequency response and imaging. [. . . ]