Kicker 48KMA6004 KMA Series 4-Channel 150W RMS x 4 at 2 Ohms, Class-D Weather-Resistant Marine Amplifier
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What's Inside?
- • 4-Channel Marine Amplifier
- • (4) 3/4" screws
- • Allen key
- • Quickstart guide
- • Power chart
- • Kicker power certification
- • Owner's Manual
Why Choose Kicker 48KMA6004 Marine Amplifier?
High-Power Class D Amplifier for Marine and Vehicle Audio
Featuring an ultra-efficient Class D design for minimal heat and maximum performance, this amplifier delivers 725 watts of dynamic power with four-channel flexibility, allowing you to power multiple speakers or bridge channels for a fully customized audio setup.
Marine-Grade Amplifier with Advanced Sound Control
Featuring a conformal-coated circuit board to resist moisture, corrosion, and salt, this amplifier ensures reliable performance in harsh marine environments. It includes a precision 12 dB variable crossover for seamless tuning and a KickEQ™ variable 6 dB bass boost to add depth and punch to your low-end audio.
Marine-Grade Amplifier with Durable Hardware
Equipped with REAL MARINE™-grade power connections that meet ABYC/NMMA standards for secure, corrosion-resistant performance, and 316L stainless-steel hardware for long-lasting durability in the harshest marine environments.
Frequently Asked Questions (FAQ)
- • Why won't the amplifier power on after installation?
Check the battery connection, ground wire, remote turn-on lead, and inline fuse for proper installation. A blown fuse or poor ground is one of the most common causes of power issues.
- • Is this amplifier safe to use in saltwater environments?
Yes. It is built with marine-grade materials that resist moisture, UV exposure, and corrosion when installed correctly.
- • Why does the amplifier go into protect mode while playing music?
Protection mode can be triggered by overheating, a wiring fault, or an incorrect speaker load. Check the speaker impedance and inspect all power and speaker connections.
- • Can I connect both speakers and a subwoofer to this amplifier?
Yes, if the system is wired according to the amplifier's channel configuration and impedance requirements. Follow the recommended wiring diagrams for the best performance.
- • Why does the amplifier become hot during long trips?
Some heat is normal when driving multiple speakers at higher output levels. Ensure the amplifier has adequate airflow and is not mounted in a confined space.
- • Why do I hear engine noise through my marine speakers?
Poor grounding or electrical interference from the boat's charging system can introduce unwanted noise. Verify the grounding point and route signal cables away from power wiring.
- • Can I use this amplifier with a factory marine stereo?
Yes. It is compatible with many factory and aftermarket marine head units using the appropriate audio connections.
- • Why does the sound become distorted when I increase the volume?
Distortion is usually caused by excessive gain, clipping, or incorrect crossover settings. Proper amplifier tuning helps maintain clean audio and protects your speakers.
- • Do I need a fuse close to the boat's battery?
Yes. Installing an inline fuse near the battery helps protect both the amplifier and the electrical system from short circuits.
- • Why does the amplifier shut off after playing for a while?
Low battery voltage, overheating, or an overloaded speaker configuration can activate the protection circuit. Check the charging system, ventilation, and speaker wiring before continued use.
- Maximum Power : 600 Watts
- Number of Channels : 4
- Frequency Response : 10-20000 Hz
- Built In Crossovers : Yes
- RMS Power Output : 4x150 Watts
- Amplifier Class : D
Features:
- Ultra-Efficient Class D Design: Enjoy powerful, high-quality sound with minimal heat and maximum efficiency, perfect for long listening sessions.
- 725 Watts of Dynamic Power: Deliver bold, crystal-clear audio with 725 watts of pure, responsive power that keeps your music alive and energetic.
- Four-Channel Flexibility: Power multiple speakers or bridge channels for greater output—ideal for creating a customized marine or vehicle setup.
- Conformal-Coated Circuit Board: Designed to resist moisture, corrosion, and salt, ensuring reliable performance even in harsh marine environments.
- Precision 12dB Variable Crossover: Take control of your sound with an adjustable crossover that allows for seamless tuning and balanced frequency response.
- KickEQ™ Variable 6dB Bass Boost: Add depth and punch to your low end with a built-in bass boost feature that enhances every beat.
- REAL MARINE™-Grade Power Connections: Built to meet ABYC/NMMA standards, providing secure, corrosion-resistant connections for true marine reliability.
- 316L Stainless-Steel Hardware: Includes premium marine-grade stainless-steel components designed to withstand the toughest conditions and last for years.
Specifications:
- RMS Power Output (Watts x Channels): 75 x 4
- Frequency Response at Rated RMS Power: 10Hz - 20kHz
- THD at Rated RMS Power: ---
- Signal to Noise Ratio: 75 dB
- Input Voltage: N/A
- Peak Power Output (Watts x Channels): N/A
- Power at 2 Ohms (Watts x Channels): 150 x 4
- Bridged Power (Watts x Channels): 300 x 2
- Minimum Impedance Bridged: 4 Ohms
- Minimum Impedance Unbridged: 2 Ohms
- Amplifier Class: D
- Low-Pass Crossover Frequency: 50-200Hz
- Low-Pass Slope: 12dB/octave
- High-Pass Crossover Frequency: 50-200Hz
- High-Pass Slope: 12dB/octave
- Bass Boost: 0-6dB
- Bass Boost Frequency: 40Hz
- Fan Cooled: No
- Fuse Rating: 80A
- Speaker Level Inputs: Yes
- Preamp Outputs: No
- Height: 2-1/4"
- Width: 12-1/2"
- Depth: 6-5/8"
- UPC: 713034020486
- Weight: 5.9
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for replacement within 2 Year(s) from the original date of purchase with proper return authorization.
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Write a review!
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wow, what a great amp. recently installed it in my boat with a set of new speakers, and it sounded way way better. definitely rocks and its value is off the charts for the price i paid. pushing my 6x9s to their limit with great sound quality. easy to set up. can't go wrong with this amp.
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Its components and design seem to withstand any issues with getting exposed to water. It has that durable vibe but will still check it out more and will give a another review next month. But it looks great and it sound even better too. Seems like I’m going to have a fun boat ride with this amp.
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Bought two of these and had them installed in my boat, running all of the eight speakers and there is really an improvement on the sound. The amps feel to be durable and I hope they have the longevity that I expected from them, as the amps before them just gave up on me in less than two years.
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Powering the 6.5 speakers of my boat and its doing alright. Good power output. High quality sound with great clarity coming from the amp. Does not disappoint, especially for its price. Great value for a marine amplifier.
