KX400.4 Car Amplifier Operation Manual

OPERATION

Mini-USB for internal use only; do NOT remove or tamper. KICKER is not responsible for any damage to equipment resulting from connections made to this port.

Automatic Turn-On Selection: The KX series offers three different automatic turn-on modes that can be selected on the end panel; +12V, DC Offset, and Audio. Using either the DC Offset or Audio mode causes the REM terminal to have +12V out for turning on additional ampliﬁ ers.

•Remote Turn-On: Set the switch to +12V to use the remote turn-on lead from your source unit. Run 18 gauge wire from the Remote Turn-On Lead on your source unit to the terminal labeled REM between the ampliﬁ er’s positive and negative power terminals. This is the preferred automatic turn-on method.

•DC Offset Turn-On: If Remote Turn-On is not an option, the next best setting is DC Offset. The DC Offset mode detects a 6V DC offset from the HI-Level speaker outputs when the source unit has been turned on.

•Signal Sense Turn-On: The Audio setting is the ﬁ nal alternative for Automatic turn-on. This is a Signal Sense turn-on method that detects the incoming audio signal from your source unit and automatically turns on the amp. This turn-on method will not work properly if the input gain control is not set appropriately.

Input Level: The RCA inputs on KICKER KX ampliﬁ ers are capable of receiving either Hi or Low-level signals from your source unit. If the only output available from your source unit is a Hi-Level signal, simply press in the Input Level switch on the ampliﬁ er. Either input method will provide a low-level output signal at the RCA output, which effectively passes the audio signal to another ampliﬁ er or component. Refer to the wiring section of this manual for additional instructions.

Input Gain Control: The input gain control is not a volume control. It matches the output of the source unit to the input level of the ampliﬁ er. Turn the source unit up to about 3/4 volume (if the source unit goes to 30, turn it to 25). Next, slowly turn (clockwise) the gain on the ampliﬁ er up until you can hear audible distortion, then turn it down a little.

Crossover Switches with Frequency Multiplier: Use the XOVER switches on the end panel of the ampliﬁ er to set the internal crossovers of AMPS 1 & 2 to OFF, HI-PASS, LO-PASS, or BAND-PASS (AMP 2 only). When the switch is set to OFF, a full bandwidth signal will be ampliﬁ ed. Set the switch to HP if you want the ampliﬁ er’s internal crossover to serve as a high-pass ﬁ lter. Set the switch to LP if you want the ampliﬁ er’s internal crossover to serve as a low-pass ﬁ lter. Set the switch to BP when a speciﬁ c frequency range is required. Never change the crossover switches with the audio system on!

Set the 1X/10X frequency multiplier switch to the setting that is appropriate for your application. A setting of 10X will set the range of the AMP 1 crossover to 100–5,000Hz, and the LO-PASS crossover of AMP 2 to 400–5,000Hz.

KICK EQ Bass Boost Control: The variable bass boost control on the side of the KX400.4 ampliﬁ er is designed to give you increased output, 0–18dB, at 40Hz. The setting for this control is subjective. If you turn it up, you must readjust the input gain control to avoid clipping the ampliﬁ er.

2013 KX 4-Channel Amps Rev C.indd 6

10/24/2012 4:31:57 PM

KX400.4 specifications

The Kicker KX400.4 is part of Kicker's renowned lineup of amplifiers, designed to deliver powerful and crystal-clear audio performance for car enthusiasts and audiophiles alike. This four-channel amplifier is engineered to provide incredible sound quality while maintaining efficiency and durability, making it a perfect choice for powering a complete audio system.

Among its main features, the KX400.4 boasts an impressive 400-watt output, ensuring that it can handle even the most demanding speaker setups. With a maximum power rating of 100 watts per channel at 4 ohms and 200 watts per channel at 2 ohms, it can drive a wide range of speaker configurations for optimal audio performance. The amplifier also features a flexible crossover system, allowing users to customize frequency ranges for each channel. This enables seamless integration of various components, ensuring that subwoofers, mids, and highs all work together harmoniously.

One of the standout technologies in the KX400.4 is its advanced thermal management system, which helps prevent overheating during extended use. The amplifier utilizes a full-range Class D circuit design, promoting high efficiency while minimizing heat generation. This not only extends the lifespan of the unit but also allows for a compact design that can be easily installed in various vehicles, even those with limited space.

The KX400.4 incorporates a variable bass boost feature, giving users the ability to enhance low-frequency response according to personal preferences. This allows for a customizable listening experience, providing the flexibility to adjust the bass levels on-the-fly. Additionally, the amplifier is equipped with a signal sensing input, simplifying installation by enabling automatic turn-on when a signal is detected.

Moreover, the KX400.4 is built with high-quality components, including a robust aluminum chassis that offers both durability and aesthetic appeal. The amplifier's design features top-quality RCA inputs and speaker outputs, ensuring secure connections for optimal performance.

In summary, the Kicker KX400.4 sets a high standard in car audio amplification, combining power, efficiency, and a range of user-friendly features. Its advanced technologies and solid construction make it an excellent choice for anyone looking to elevate their in-car listening experience. With this amplifier, Kicker continues to demonstrate its commitment to delivering exceptional automotive audio solutions for enthusiasts around the world.