Kicker LX500.4 Amp 4 Channel Car Amplifier with DSP Features & LX Controller
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The Kicker LX500.4 is a 4-channel Class-D amplifier from the Kicker LX Series, producing 225W x 4 at 2 ohms or 450W x 2 bridged at 4 ohms. It includes the LXCC LX Control Center for in-car adjustment of gain, time delay and crossovers.
Key specifications
- Channels: 4 (bridgeable)
- RMS power @ 14.4V: 225W x 4 at 2 ohms, 125W x 4 at 4 ohms, 450W x 2 bridged at 4 ohms
- Dynamic power: 1100W
- Frequency response: 20–20kHz
- Crossover: each pair Off/HP/LP/BP, HP 20–5kHz, LP 40–5kHz
- Selectable slopes: 12/18/24dB Butterworth, 12/24dB Linkwitz-Riley
- Inputs: high level 1V–40V, low level 125mV–5V
- Dimensions: 6 cm H x 21.4 cm W x 24 cm L
- Included: LXCC control centre (no sub channel, so no LXRC)
LX500.4 4-Channel Amplifier
All multi-channel LX amplifiers are bridgeable and include a wired LXCC control centre. The LX Series balances SQL design with high-powered output, incorporating widely requested features without compromising performance.
From the Ground Up
The LX Series is Kicker's high-power premium amplifier line, designed in-house. It delivers precision control, flexibility and lasting build quality.
- Tune the entire system from the driver's seat using the included LX Control Centre
- Class-D design for lower current draw, longer playing times and lower operating temperatures
- Gain-match LEDs indicate the correct gain setting at a glance
- Reversible centre panel and a choice of 11 RGB LED accent colours for a customisable look
- FIT+™ technology accepts low- and high-level signals up to 40V, with differential inputs to eliminate unwanted noise
- Choice of turn-on modes plus comprehensive thermal, circuit and voltage-stability protections
Comes with the LX Control Centre (LXCC)
- Diagnostic readouts: monitor battery voltage, LED output clip indication, amp temperature and protection status in real time
- Precision control: adjust gain trim, left-channel time delay, and selectable crossover type, slope and frequency — HP, LP or BP available for all full-range channels
- Integrated cable length: 3.28 feet (1 m), wired directly into the amp
Explore the full range in Kicker Amplifiers.
Specification
| Frequency Response | [Hz] 20–20k |
|---|---|
| Signal-to-Noise Ratio (a-weighted, re | rated power) >95dB |
| Signal-to-Noise Ratio (ref | 1W output) >75dB |
| Dimensions | [in, cm] Height 2-3/8 (6 cm) Width: 8-7/16 (21.4 cm) Length: 9-7/16 (24 cm) |
| Each channel pair Off/HP/LP/BP | • HP: 20–5kHz • LP: 40–5kHz |
| Selectable Topology | 12, 18, or 24dB/oct Butterworth; 12 or 24dB/oct Linkwitz-Riley |
More specs
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What's Included
- LX500.4 4-Channel Amplifier
- LX Control Center LXCC (integrated 3.28 feet (1m) cable, directly into amp)
Kicker
About the Kicker 51LX5004
From our tech experts at CEN
The Kicker LX500.4 is a 4-channel Class-D amplifier from Kicker's LX Series, rated at 125W x 4 at 4 ohms or 225W x 4 at 2 ohms, bridgeable to 450W x 2 at 4 ohms. It includes the wired LXCC LX Control Center, which lets you adjust gain, time delay and crossover type, slope and frequency from the driver's seat.
Who it suits
The LX500.4 suits car audio enthusiasts building a high-power front stage system where DSP control matters. Drivers needing less output might consider the Kicker KEY200.4, which also includes DSP at 4x50W.
Our tech experts advise
At 24 cm long, check available boot or under-seat space before purchasing. FIT+™ differential inputs accept high-level signals up to 40V, so it works alongside a factory head unit without a line output converter. The included LXCC cable is 1 m long — plan your installation routing accordingly. Fitting cost varies by vehicle; see our car audio installation page for details.
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Have it Fitted By Our Team
Our team fits car audio, stereos, dash cams and vehicle security at our workshop in Beeston, Nottingham. Tell us your vehicle and we'll confirm the parts and a fitted price.
- 1
Tell us your vehicle
Make, model and year, and what you'd like fitted.
- 2
We confirm the parts
Fascia, wiring and interfaces checked for your car, with a fitted price.
- 3
Fitted at our workshop
Bring it to our Beeston workshop and we do the rest.
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Frequently Asked Questions
Q: How do I choose the right amplifier for my speakers or subwoofer?
A: Match the amplifier's RMS output per channel to the RMS handling of your speakers or subwoofer at the same impedance. The Specification tab lists the power figures. If in doubt, contact CEN with your setup and we will recommend a match.
Q: What wiring do I need to install this amplifier?
A: You will need an amplifier wiring kit sized to the amplifier's power draw, typically including power and earth cable, a fuse, RCA leads and a remote wire. CEN stocks complete wiring kits, and the amplifier's fuse rating is the guide to the cable gauge required.
Q: What class of amplifier is this and does it matter?
A: Class D amplifiers are compact and efficient, ideal for subwoofers and modern installs. Class AB designs are traditionally favoured for outright sound quality on mid and high frequencies. The class is listed in the Specification tab where provided.
Q: Will an amplifier work with my factory head unit?
A: Yes, in most cases. If your head unit has no RCA outputs you will need a line output converter to feed the amplifier a clean signal. CEN stocks line output converters and can advise the right one for your vehicle.
Q: Can CEN install this amplifier?
A: Yes. CEN offers professional amplifier installation from our Nottingham premises, including secure mounting, wiring and setup. Contact us to book.
Q: How much power is the Kicker LX500.4?
A: At 14.4V it produces 225W x 4 at 2 ohms, 125W x 4 at 4 ohms, or 450W x 2 bridged at 4 ohms, with 1100W dynamic power.
Q: Does the LX500.4 come with the LXRC bass remote?
A: No. The LX500.4 has no sub channel, so it comes with the LX Control Center (LXCC) rather than the LXRC remote, and KickEQ+ does not apply to this model.
Q: Can the LX500.4 run a subwoofer?
A: It can be bridged to 450W x 2 at 4 ohms, but it has no dedicated sub channel. For a sub, many systems add a mono amplifier such as the LX850.1.
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