The Kicker KXMA Zone Volume Controller (48KXMARLC) takes one stereo RCA signal from a source unit and splits it into up to four independent stereo outputs, each with its own volume knob. At $329.99, it's the piece that was missing from the already-covered KXMA800.8: an 8-channel amp gives a boat's bow, cockpit, and tower zones their own dedicated speaker channels, but it doesn't give each zone its own volume control without this controller sitting in front of it.
It's a universal accessory, not locked to one specific amp, and works with any amplifier that has pre-amp level inputs.
Key Takeaways
- Splits one stereo RCA source into up to 4 independent stereo zones, each with its own dedicated volume knob.
- Built-in line driver outputs up to 8V per channel, letting you run amp gains lower for less system noise.
- Compatible with any amplifier featuring pre-amp level inputs, not restricted to Kicker amps specifically.
- Includes an amp remote turn-on output and customizable zone labels.
- Ships as a two-piece system: a hide-away processor unit plus a half-DIN remote zone controller, with all mounting hardware included.
Why an 8-Channel Amp Alone Doesn't Solve Multi-Zone Volume
The KXMA800.8 (and similar multi-channel amps) sets gain per channel at the amp itself, which works fine for a single listening area but doesn't give someone standing at a helm control over the cockpit's volume independently from the bow. This controller sits between the source unit and the amp, giving each of up to four zones its own physical knob so volume changes don't require walking back to the amp or fumbling with a head unit menu per zone.
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Feature Walkthrough
Signal Distribution
Takes one stereo RCA input and distributes it to up to 4 independent stereo RCA outputs, each with its own volume knob on the remote controller.
Line Driver
Delivers up to 8V per channel (1kHz, 14.4V DC, THD <1%), with 10,000-ohm input impedance and 100,000-ohm output impedance. The higher output voltage lets an amp's own gain be set lower, which reduces system noise, a real benefit on a boat with multiple amps and long RCA runs.
Physical Layout
A hide-away processor handles the actual signal splitting, while a separate half-DIN remote controller with the volume knobs mounts wherever it's actually usable, at the helm or a dash panel. Both surface- and flush-mount hardware are included.
Which Amps This Actually Pairs With
This controller works ahead of any amplifier with pre-amp level inputs, it isn't limited to KXMA-series amps despite the name. It's a particularly natural fit for the already-covered KXMA800.8 given its 8-channel, multi-zone design, and works just as well ahead of the 4-channel side of the KXMA900.5 if that build also splits across separate zones.
Who It's For
Choose this controller if your boat has genuinely separate listening zones and you want physical, independent volume control at each one without touching the amp or source unit. It's unnecessary for a single-zone system where one volume control already covers the whole boat.
Honest Cons
$329.99 is a real added cost on top of whatever amp and speakers are already funding a multi-zone build. It only pays off if you actually need independent zone control, not just multiple speaker pairs.
Maxes out at 4 zones. A build needing more independent zones than that isn't served by a single unit.
No numbered IP rating published for either the processor or the remote controller.
Frequently Asked Questions
Does this work with non-Kicker amplifiers?
Yes — it works with any amplifier that has pre-amp level inputs, not just Kicker's own lineup.
Do I need one of these for every amp on my boat?
No — one unit distributes to up to 4 zones from a single source, regardless of how many amps sit downstream of it.
Can I label which knob controls which zone?
Yes — it includes customizable labels for naming each zone on the remote controller.
Does it turn amps on automatically?
It includes an amp remote turn-on output, so it can trigger connected amplifiers along with the source unit's own remote turn-on signal.
Bottom Line
The KXMA Zone Volume Controller is the accessory that turns a multi-channel amp's separate zones into genuinely independent listening areas. Worth it specifically for boats with real, separate zones; skip it if one volume level already works for the whole system.
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