The Kicker KMC5 ($649.99) packs 6 channels of built-in amplification, up to 240W total. The JL Audio MM55 ($429.99) includes 4 channels at 100W total, and JL Audio also sells the MM105-HR with zero built-in channels at all, by design. Both the KMC5 and MM55 are NMEA 2000 certified, at a $220 price gap in Kicker's favor for channel count and total power.
The decision here isn't really "which brand," it's how much amplification you actually want built into the source unit itself.
Head-to-Head
| Spec | Kicker KMC5 | JL Audio MM55 |
|---|---|---|
| Price | $649.99 | $429.99 |
| Built-In Amp Channels | 6 | 4 |
| Power @ 4-Ohm | 6 x 25W (150W total) | 4 x 25W (100W total) |
| Power @ 2-Ohm | 6 x 40W (240W total) | Not published at 2-ohm on this listing |
| Water Rating | IP66 | IP67 |
| Display | 3.5" sunlight-viewable LCD | 2.8" full-color LCD |
| Preamp Zones | 4 sets of RCA outputs, zone-2 capable | 9 channels across 3 zones, dedicated sub output per zone |
Key Takeaways
- Kicker's KMC5 delivers more built-in channels and more total power, at a $220 higher price.
- JL Audio's MM55 carries a slightly higher IP67 water rating versus Kicker's IP66.
- Both are NMEA 2000 certified for Garmin, Lowrance, Raymarine, or Simrad MFD control.
- JL Audio's MM55 includes a dedicated subwoofer output per zone across its 3-zone preamp section, a specific feature Kicker's spec sheet doesn't call out the same way.
- If you want a source unit with no built-in amp at all for a fully external-amp build, JL Audio's MM105-HR is the option, Kicker's KMC5 always includes its own amplification.
Why Channel Count Isn't the Whole Story
Kicker's KMC5 assumes you'll use its built-in 6-channel amp to drive most or all of your system directly, hence the higher power and channel count. JL Audio's MM55 includes a smaller built-in amp but pairs it with 9 channels of preamp output across 3 zones with dedicated sub outputs, suggesting a build that mixes some direct-driven speakers with separately amplified zones. Neither approach is wrong, they assume different system architectures from the start.
Check the Kicker KMC5 → | Check the JL Audio MM55 →
Feature Walkthrough
Built-In Amplification
KMC5: 6 x 25W at 4-ohm, 6 x 40W at 2-ohm, for up to 240W total. MM55: 4 x 25W at 4-ohm (100W total), no 2-ohm figure published on this listing.
Preamp Zones
KMC5 includes 4 sets of RCA outputs and zone-2 capability for expansion. MM55 includes 9 preamp channels across 3 zones, each with its own dedicated subwoofer output, a more granular zone structure on paper.
Water Resistance and Display
KMC5 carries an IP66 rating with a 3.5" sunlight-viewable display. MM55 carries a slightly higher IP67 rating with a smaller 2.8" full-color display.
Who Each One Is For
Choose the Kicker KMC5 if you want the most built-in power and channel count to drive speakers directly without adding external amps. Choose the JL Audio MM55 if a lower price, a slightly higher water rating, and dedicated per-zone sub outputs across 3 zones matter more than raw built-in wattage. If you want zero built-in amplification for a fully external-amp system, look at JL Audio's MM105-HR instead of either of these.
Honest Cons
The MM55's built-in amp is meaningfully less powerful than the KMC5's, 100W total versus 240W, factor that into any direct-drive speaker plans.
The KMC5's IP66 rating is a step below the MM55's IP67, though both are genuinely marine-rated.
Neither listing publishes every spec the other does (2-ohm output on the MM55's side), making a fully complete side-by-side impossible from the product pages alone.
Frequently Asked Questions
Which has more built-in power?
The Kicker KMC5, with 6 channels totaling up to 240W at 2-ohm versus the MM55's 4 channels totaling 100W at 4-ohm.
Do both support Garmin chartplotter integration?
Yes, both are NMEA 2000 certified for Garmin, Lowrance, Raymarine, or Simrad MFD control.
Is there a JL Audio option with no built-in amp?
Yes, the MM105-HR, covered in our JL Audio MediaMaster stereo guide, is a pure preamp source unit built for external-amp-per-zone systems.
How does the KMC5 compare to Fusion's stereo lineup?
See our Kicker KMC5 vs. Fusion MS-RA770 comparison for that matchup specifically.
Bottom Line
The KMC5 wins on built-in power and channel count; the MM55 wins on price and water rating. Pick based on whether you want the source unit doing most of the amplification work or splitting it across dedicated zone amps.