Running four speakers and a subwoofer usually means at least two amplifiers, sometimes three. The Kicker PXA1000.5 collapses that into one box: four full-range channels at 100W each, plus a dedicated fifth subwoofer channel rated up to 600W at 1-ohm, all in a compact, dual-certified IP66 and IP67 waterproof housing, at $662.96 (down from $879.99).
As an authorized Kicker dealer, we want to lead with something that applies to this entire PXA line, not just this one amp: it's the first amplifier family in this catalog with a genuine, numbered waterproof rating. Every KMA and KXMA amp we've reviewed so far has stated general "weather-resistant" language without a formal IP number attached. The PXA line changes that.
Key Takeaways
- Dual IP66 and IP67 certification — the first numbered, formally rated waterproofing we've seen on any amplifier in this catalog, marine or powersports.
- Five channels in one amp: four full-range channels at 100W (2 or 4-ohm), plus a dedicated subwoofer channel rated 600W at 1-ohm, 500W at 2-ohm, or 300W at 4-ohm.
- Solder-free inline power and ground couplers, and a choice of DC offset or 12V trigger turn-on, both genuine install-simplicity features not mentioned on the marine KMA/KXMA amps.
- Marketed specifically for UTVs, off-road vehicles, hot rods, and other space-challenged installs where mounting one amp is already tight, let alone two or three.
- At $662.96, it costs less than buying a comparable 4-channel amp and a separate mono sub amp individually in most cases.
Finally, a Numbered Waterproof Rating
IP66 means protection from dust and powerful water jets or splash. IP67 adds protection from temporary submersion. Having both ratings stated together, rather than general "weather-resistant" language, is a real step up in documentation from every amp we've covered in the marine KMA and KXMA lines. If a specific, tested waterproof rating matters to your install, this line is the first place in our amplifier coverage where you get one.
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Feature Walkthrough
Five Channels, One Box
Four channels handle full-range speaker duty at 100W each (2 or 4-ohm), while a fifth dedicated channel drives a subwoofer at up to 600W (1-ohm), 500W (2-ohm), or 300W (4-ohm). That's a genuinely different format from the 4-channel-only or mono-only amps we've reviewed elsewhere — one box replaces what would otherwise be a 4-channel amp plus a separate mono sub amp.
Solder-Free Install
Included inline power and ground couplers connect without soldering or crimping, a real time-saver for a DIY install in a cramped UTV dash or under a hot rod seat.
Dual Turn-On Modes
Choose DC offset or 12V trigger turn-on depending on your specific head unit's remote-on output, giving more flexibility than a single fixed turn-on method.
Dynamic Power
1400W dynamic power is rated separately from the continuous RMS figures above, a short-term headroom number rather than sustained output.
Amplifier-to-System Matching
At 100W per full-range channel, this pairs well with mid-power speakers across four positions, plus a subwoofer on the dedicated fifth channel. Confirm your specific speakers' RMS ratings and your subwoofer's wired impedance before setting gain; this is our own system-matching guidance, not an official Kicker-confirmed pairing.
Who It's For
Choose the PXA1000.5 if you're building a complete four-speaker-plus-subwoofer system in a UTV, off-road vehicle, or any install where mounting multiple separate amps isn't realistic. It's not the right amp if you only need two channels or don't want a subwoofer at all — the smaller PXA400.4 (full-range only) is worth comparing for that simpler case.
Honest Cons
Losing the amp means losing your whole system at once, unlike separate amps where one failure doesn't take down every channel. Consider that tradeoff for a build you depend on heavily.
$662.96 is a real investment even accounting for replacing two separate amps — confirm you actually need all five channels before buying.
Full-range channels are fixed at 100W, not adjustable upward if you later want more power for just the speaker channels without the sub channel.
Frequently Asked Questions
Does this really replace two separate amps?
For a 4-speaker-plus-subwoofer system, yes — one PXA1000.5 does the job of a 4-channel amp and a mono sub amp combined.
What does IP66 and IP67 actually mean together?
IP66 covers dust and powerful water jets/splash; IP67 adds protection from temporary submersion. Having both stated is a stronger combined claim than either alone.
Can I run this without a subwoofer?
Yes, though you'd be paying for a dedicated sub channel you're not using — the PXA400.4 (full-range only, no sub channel) is a better fit if you don't need one.
Does it need special wiring?
The included inline power and ground couplers are solder-free, and you can choose between DC offset or 12V trigger turn-on depending on your head unit.
Bottom Line
The PXA1000.5 is a genuine all-in-one solution for a full speaker-plus-subwoofer system in space-constrained vehicles, backed by the first real numbered waterproof rating in this catalog's amplifier lineup. It's the right call when you need everything this amp offers; it's overbuilt if you don't need the subwoofer channel at all.