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The Kicker 48PXA4004 is a 400W RMS, four-channel, Class D full-range amplifier from the Kicker PXA Series. It is fully waterproof to IP66 and IP67, making it suitable for watercraft, off-road vehicles, classic cars and space-challenged installations.
Other waterproof PXA models: 48PXA10005 5-channel, 48PXA3001 300W mono, 48PXA6001 600W mono.
Key specifications
- Channels: 4 full-range
- RMS power: 100W x 4 @ 4Ω, 150W x 4 @ 2Ω
- Bridged power: 300W x 2 @ 4Ω
- Dynamic power: 800W
- Waterproofing: IP66 and IP67
- Amplifier class: D
- Crossovers: 80/120Hz high-pass, 80Hz low-pass, 24dB/octave
- Fuse rating: 60A, 8 AWG cable
- Dimensions: 24.8 x 11.5 x 4.5 cm
Anywhere. Any Weather.
The entire PXA line is completely waterproof, with sealed bulkhead grommeting, gasketed joints and a sealed preamp control door. This earns the range both IP66 and IP67 certifications.
What is IP66 and IP67?
IP66 means the amplifier is protected against heavy seas or powerful jets of water. IP67 means no dust can enter, and the unit can be submerged in one metre of water for 30 minutes without moisture ingress. Note: certifications do not apply to the wire couplers.
Got The Goods
PXA amplifiers are built for all environments. Each unit includes no-rust stainless-steel mounting hardware and a pair of shielded in-line couplers to extend power and ground connections — no soldering or crimping required.
- Waterproof design with IP66 and IP67 certifications
- Ideal for watercraft, off-road vehicles or space-challenged vehicles
- High-efficiency Class D technology
- 800W dynamic power from a compact footprint
- Dual turn-on modes: DC offset or 12V trigger
- Includes inline power and ground couplers — no soldering or crimping needed
- Stainless-steel mounting hardware included
Explore the full range in Kicker Amplifiers.
Specification
| RMS Power @ 14.4V | 100W x 4 @ 4Ω / 150W x 4 @ 2Ω / 300W x 2 @ 4Ω Bridged |
|---|---|
| Voltage (V) | 12 |
| Class | D |
| Fuse Rating (A) | 60 |
| Cable Gauge (AWG) | 8 |
| Amp Turn-On | +12V Remote / DC Offset |
| Frequency Response | (Hz) 10-20k |
| Filter | High-Pass / Low-Pass |
| Controller | CXARC (Sold Separately) |
| Input Type | High & Low Level |
| Height (cm) | 4.5 |
| Width (cm) | 24.8 |
| Depth (cm) | 11.5 |
More specs
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What's Included
- Kicker 48PXA4004
- 2 x DC power couplers
- Stainless-steel mounting hardware
- Customer information card
Kicker
About the Kicker 48PXA4004
From our tech experts at CEN
A 4-channel amplifier, rated at 400w RMS. Enough channels for a front and rear stage, or a front stage with the remaining channels bridged onto a sub.
Who it suits
Drivers who have upgraded their speakers and found the head unit cannot drive them. This is the step that makes good speakers sound like good speakers.
Our tech experts advise
Published power figures mean little until the amplifier is matched to the speakers and the gains are set with a meter rather than by ear. It needs a fused feed from the battery on the correct cable gauge, the part we most often see done badly. Installation is priced per vehicle, so get in touch with your make, model and year and we will confirm what it needs. See car audio installation.
Explore the full Kicker range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Kicker
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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.
Unit 25 Technology Drive, Beeston, Nottingham NG9 1LA
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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 waterproof are the Kicker PXA amplifiers?
A: They are IP66 and IP67 certified: protected against powerful jets of water, dust-tight, and able to withstand submersion in 1 metre of water for 30 minutes. The certifications do not apply to the wire couplers.
Q: Can I add a remote level control to the 48PXA4004?
A: Yes. It works with the Kicker CXARC controller, which is sold separately.
Q: Can the 48PXA4004 be bridged?
A: Yes. It delivers 300W x 2 bridged at 4 ohms, or 100W x 4 at 4 ohms and 150W x 4 at 2 ohms in four-channel mode.
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