LX500.4 - Receiver KICKER - Free user manual and instructions
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| Product Type | 4-Channel Car Audio Amplifier |
| Brand | KICKER |
| Model | LX500.4 |
| Amplifier Class | Class A/B |
| Number of Channels | 4 |
| RMS Power (4 ohms) | 75W x 4 |
| RMS Power (2 ohms) | 125W x 4 |
| Bridged RMS Power (4 ohms) | 250W x 2 |
| Frequency Response | 20Hz – 20kHz |
| Signal-to-Noise Ratio | >100 dB |
| Total Harmonic Distortion | <0.1% |
| Input Sensitivity | 200mV – 5V |
| Dimensions (H x W x D) | 2.25 x 8.75 x 13.75 inches |
| Weight | 10.5 lbs |
| Power Supply Voltage | 10-16 VDC |
| Fuse Rating | 50A |
| Variable Crossover | Yes (50-200 Hz, selectable low/high/bandpass) |
| Bass Boost | 0-12 dB at 40 Hz |
| Input Type | RCA and Speaker Level |
| Remote Turn-On | 12V trigger |
| Safety Features | Thermal overload, short circuit, DC offset protection |
| Maintenance | Clean with dry, lint-free cloth; avoid moisture and solvents |
| Spare Parts & Repairability | Not user-serviceable; consult authorized KICKER service center |
| Certifications | CE, FCC |
Frequently Asked Questions - LX500.4 KICKER
What is the recommended speaker impedance for this amplifier?
The KICKER LX500.4 is stable down to 2 ohms per channel in stereo mode and 4 ohms in bridged mode. For best performance, use speakers with impedance of 4 ohms or higher.
How do I wire the amplifier for bridged operation?
To bridge channels, connect the positive speaker wire to the positive terminal of the left channel and the negative wire to the negative terminal of the right channel. Ensure the amplifier is set to bridged mode via the input configuration.
What gauge power wire should I use?
For the LX500.4, use 4 AWG power and ground wire for lengths up to 20 feet. For shorter runs, 8 AWG may suffice, but check the amplifier's power requirements.
Can I use this amplifier with a factory radio?
Yes, the LX500.4 accepts speaker-level inputs. Use the included adapters or connect directly to speaker wires. Set the input sensitivity to match the source output.
What is the function of the variable crossover?
The variable crossover allows you to select low-pass, high-pass, or bandpass filtering with an adjustable frequency from 50 to 200 Hz. This helps match the amplifier to your speakers or subwoofers.
Why does the amplifier go into protection mode?
Protection mode activates due to overheating, a short circuit, impedance below minimum, or DC offset. Check wiring, impedance, and ventilation. Let the amplifier cool before restarting.
How do I adjust the gain (input sensitivity)?
With the head unit at 3/4 volume, play a clean test tone (e.g., 50 Hz for subs). Turn the gain knob clockwise until you hear distortion, then back off slightly. Use a multimeter for precise setting.
Can I run a subwoofer off this amplifier?
Yes, bridge two channels to a single 4-ohm subwoofer for up to 250W RMS. Alternatively, use one channel per sub if wiring in parallel.
What is the recommended fuse size for the power line?
Install a 50A fuse (ANL or MAXI type) within 18 inches of the battery. This matches the amplifier's internal fuse rating.
How do I clean the amplifier?
Disconnect power. Use a dry, soft cloth to wipe the exterior. Do not use water, cleaners, or compressed air as they may damage internal components.
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USER MANUAL LX500.4 KICKER
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Product information
Brand : KICKER
Model : LX500.4
Category : Receiver