Most mono amplifiers lose power as impedance rises, less current at 2-ohm than at 1-ohm. The Kicker KXMA1500.1 doesn't follow that pattern: it delivers the identical 1500W at both 1-ohm and 2-ohm, only dropping to 750W at 4-ohm. It's a Class D mono marine subwoofer amplifier, the largest single-channel amp in this catalog, at $559.96 (down from $799.99).
As an authorized Kicker dealer, that flat 1-to-2-ohm power curve is the detail we think is most worth explaining clearly, since it changes how you'd wire multiple subwoofers to this amp compared to a more typical mono amp.
Key Takeaways
- Delivers an identical 1500W at both 1-ohm and 2-ohm loads — unusual behavior, since most amps deliver less power as impedance rises within that range.
- Power drops to 750W at 4-ohm, exactly half the 1/2-ohm figure — a real difference, unlike the flat curve below it.
- Class D design with 2500W of rated dynamic power, a conformal-coated circuit board, and Real Marine ABYC/NMMA-compliant power connections.
- Includes the KMBLC remote level control and an RCA pass-through output for expanding the system with additional amps.
- At $559.96, it's the most expensive single amplifier we've reviewed, and the largest mono amp in this catalog.
The Flat Power Curve, Explained
Wiring multiple subwoofers in parallel typically lowers total impedance (two 4-ohm subs in parallel present a 2-ohm load, for example). On most amps, that drop from 2-ohm toward 1-ohm still changes available power meaningfully. The KXMA1500.1 delivers the same 1500W whether the total load is 1-ohm or 2-ohm, which means you have real flexibility in how many subwoofers you wire and in what configuration within that range, without sacrificing power by landing at 2-ohm instead of 1-ohm. That flexibility disappears at 4-ohm, where output is cut exactly in half.
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Feature Walkthrough
Class D Efficiency
Class D amplifier design is significantly more power-efficient than Class A/B (used in the smaller KMA150.2 we've also reviewed), which matters directly for a marine electrical system's battery draw when running a high-power subwoofer amp for hours on the water.
Crossover and Bass Boost
A variable 24dB crossover and KickEQ+ variable 0-6dB bass boost let you tune output to your specific subwoofer and enclosure, alongside a variable 10-80Hz subsonic filter to protect the sub from damaging low-frequency content.
KMBLC Remote Included
Unlike some amps where a bass remote is a separate purchase, the KMBLC remote level control ships included, letting you adjust bass from the dash without reaching for the amp itself.
RCA Pass-Through
The pass-through output lets you chain additional amplifiers off the same source signal, useful if you're expanding a system beyond a single sub amp later.
Amplifier-to-Subwoofer Matching
At 750W (4-ohm) to 1500W (1 or 2-ohm), this amp significantly exceeds the power handling of every subwoofer covered elsewhere in our current lineup so far. Confirm your specific subwoofer's RMS rating and wired impedance before setting gain, since running this amp anywhere near its rated output into an underpowered subwoofer risks damage. This is general amp-matching guidance, not a specific Kicker-confirmed pairing.
Who It's For
Choose the KXMA1500.1 if you're building a serious bass system with multiple subwoofers, or a single high-power subwoofer that can actually use this much output. It's not the right amp for a modest single-sub setup where a smaller, less expensive amp would suffice without leaving huge amounts of unused headroom.
Honest Cons
Significant overkill for a single, modest subwoofer. Match this amp's real output to a subwoofer (or subwoofers) actually rated to use it.
$559.96 is the highest single-amp price we've reviewed. Budget builds are better served by the smaller amps in this catalog.
No formal IP rating published, though ABYC/NMMA-compliant connections indicate genuine marine-grade construction.
Frequently Asked Questions
Why doesn't power drop between 1-ohm and 2-ohm?
Kicker's Class D design for this amp is built to deliver identical output across that specific impedance range, giving more wiring flexibility for multiple subwoofers than a typical amp that loses power as impedance rises within the same range.
Does the KMBLC remote cost extra?
No — it's included with the amplifier, unlike some competing amps where a bass remote is a separate accessory purchase.
Can I run this amp at 4-ohm?
Yes, at a reduced 750W output, exactly half of the 1/2-ohm figure.
What subwoofers pair well with this amp?
Match your subwoofer's RMS rating and wired impedance to this amp's actual output at that impedance; we haven't yet reviewed a Kicker subwoofer capable of using its full rated power in this batch.
Bottom Line
The KXMA1500.1 is the biggest, most capable single-channel marine amp in this catalog, with a genuinely useful flat 1-to-2-ohm power curve for multi-subwoofer wiring flexibility. It's built for serious bass systems, not a casual single-sub upgrade, so match your actual subwoofer setup to its real output before buying.