---
product_id: 1145274
title: "JBL MA6004 4-Channel Full-Range Marine Amplifier"
brand: "jbl"
price: "€ 343.52"
currency: EUR
in_stock: true
reviews_count: 6
url: https://www.desertcart.fi/products/1145274-jbl-ma6004-4-channel-full-range-marine-amplifier
store_origin: FI
region: Finland
---

# Marine-grade corrosion resistance 60W RMS x 4 channels clean power 12dB variable bass boost & crossover JBL MA6004 4-Channel Full-Range Marine Amplifier

**Brand:** jbl
**Price:** € 343.52
**Availability:** ✅ In Stock

## Summary

> ⚓ Amplify your marine moments with power and precision — don’t just float, make waves!

## Quick Answers

- **What is this?** JBL MA6004 4-Channel Full-Range Marine Amplifier by jbl
- **How much does it cost?** € 343.52 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/1145274-jbl-ma6004-4-channel-full-range-marine-amplifier)

## Best For

- jbl enthusiasts

## Why This Product

- Trusted jbl brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Custom Bass Control:** 12dB variable bass boost and built-in electronic crossovers let you fine-tune your sound system to match your vibe and environment.
- • **Plug & Play Versatility:** Easily connect via RCA or 3.5mm adapters—no pre-amp needed—making setup seamless whether on your boat, cooler, or outdoor rig.
- • **Saltproof Sound Mastery:** Fully marinized circuit boards shield your amp from salt and corrosion, ensuring relentless performance on every water adventure.
- • **Powerful 4-Channel Output:** Delivers crisp, distortion-free 60W RMS per channel at 4 ohms, perfect for immersive multi-speaker setups that command attention.
- • **Rugged Stainless-Steel Hardware:** Durable, corrosion-resistant hardware built to withstand harsh marine conditions and keep your system locked tight.

## Overview

The JBL MA6004 is a robust 4-channel marine amplifier engineered with marinized circuit boards and stainless-steel hardware to resist saltwater corrosion. It delivers 60W RMS per channel at 4 ohms with less than 1% distortion, featuring a 12dB variable bass boost and built-in electronic crossovers for customizable sound tuning. Designed for durability and high performance in marine environments, it supports direct input from phones or audio devices without a pre-amp, making it ideal for boaters and outdoor enthusiasts seeking loud, clear, and reliable audio.

## Description

Fully marinized circuit boards to keep salt and corrosion away from the critical circuit path on board 12dB electronic crossovers to provide tuning options for systems of any Sizema6002: 160 watts at 2 ohms, 60W RMS x 2 channels at 4 ohms and less than or equal to 1 percent THD + Nma6004: 145 watts at 2 ohms, 60W RMS x 4 channels at 4 ohms and less than or equal to 1 percent THD + N

Review: Amazing amp, perfect for cooler stereo - I purchased this bad boy to power my Igloo cooler stereo that I built for floating the local rivers and getting the parties started out in the sticks. I paired it with two JBL Marine 6x9s (bridged), and all I can say is that this thing is VERY loud and crystal clear with absolutely no distortion at high volumes. In fact, I think I may have gone a little overboard on my project - we brought the cooler out disperse camping the other weekend and it sounded like we were having a rave in the forest. Anyway, I digress. Back to the amp... I've seen a lot of reviews on here about overheating issues. Let me tell you, I ran this amp sitting inside of my cooler in the beating sun here in Sacramento with outside temps of over 95 degrees playing music at loud levels for hours with absolutely no issues whatsoever. Granted, the cooler may be insulating the amp a little bit from the temps, but still, I have no fans or other cooling devices inside. I haven't had a chance to test the marinized circuit board (and, quite frankly, I hope I don't run into a scenario where I'd need to, because that would mean my cooler was sinking), but the build quality on the amp is superb. It definitely looks like it could stand up the the harsh marine elements in a semi-exposed environment. This amp provides all of your typical adjustment knobs on the back: input gain, bass boost, high pass/low pass filter and frequency adjustment for both channels. The bass boost function works great, and really seems to add a lot of extra "umph" to my 6x9s. I've seen a few people posting general concerns about plugging a phone or other audio device directly into this amp using a 3.5mm headphone to RCA adapter (to avoid installing a deck). I can attest that you'll have absolutely no problem doing this with this amp; you will not need a pre-amp. The amp gets plenty loud using only the adapter cable. For those wanting to bridge 6x9s or other speakers, simply plug an extra RCA cable into the AUX output and then to the Rear input and plug your 3.5mm headphone to RCA adapter into the Front Input. A lot of you probably already know how to do this, but I figured I'd mention it for any newbies out there (like I was!) So, if you're looking for a LOUD, crisp, sexy looking amp that will keep your boat or other water toys rocking, this is the one for you. I've had it for a couple months now and it has performed flawlessly. Side note: This amp has three bright, blue power lights directly under the JBL logo. Something to consider if minor aesthetics are to be taken into account during your system build. UPDATE: June 2016 After two years, this amp is still kicking just fine. I've taken it out camping and floating over 20 times now and it sounds the same it did the day I bought it, and I've definitely put it through some abuse. All is not perfect, however. Some of the overheating issues that other buyers have mentioned have come to fruition. These overheating episodes only happen on very hot days when the amp is blasting at very high volumes. Since my amp is in an enclosed cooler, overheating is almost inevitable. I'm not going to knock any stars off my review; this is still an excellent buy and the sound quality cannot be beat. I plan on installing a pair of computer fans in the cooler to help cool this thing down when I really crank the volume on hot summer days.
Review: Solid amp, good price, efficiency not it's strong point. - I bought this amplifier to build a portable 2.1 system. The bridging features, crossovers, and independent gain controls are awesome and make a multichannel setup a breeze to hook up. Do note that if the front and rear channels are to receive the same signal, RCA jumpers from the pass through must be connected to the b channels externally. The three blue lights on the top are very bright. For size constrained projects, you might consider another product, so name sure you review the dimensions. Because I had the amp running off a small 12 volt agm sla battery, I was originally concerned with power consumption, and the amplifier gets quite warm. Although I originally attributed most of this to an inefficient design, the length of time the amp can run on such a small battery (18ah) has convinced me to look elsewhere for at least part of the heat build up. After thinking about it, I think that the fanless design, important for the marine grade build, may explain the issues some people have described. Most amplifiers with decent power output at least have vents, many with fans. This is a SEALED amplifier. It will get hot. Ensure proper and this amp works great. The features are nice, the price is right at ~ $100, and pungent l plenty of juice for most systems. I'm satisfied with this product, 4 stars because it won't work for everybody. Edit: lost a star because screw terminal stripped out way too easily

## Features

- Marinized circuit board
- Stainless-steel hardware
- Variable bass boost
- 12dB built-in variable electronic crossover
- 60W RMS x 4 channels at 4 ohms and ≤1% THD + N

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000N3S83K |
| Best Sellers Rank | #911,237 in Electronics ( See Top 100 in Electronics ) #198 in Marine Amplifiers |
| Customer Reviews | 3.8 3.8 out of 5 stars (213) |
| Date First Available | June 18, 2008 |
| Height (inches) | 6 inches |
| Is Discontinued By Manufacturer | No |
| Item Weight | 7.62 pounds |
| Item model number | MA6004 |
| Product Dimensions | 12 x 8 x 10 inches |
| Warranty | 1yr |
| Weight | 5.5 Pounds |
| Width (inches) | 6 inches |
| Wireless Remote | No |

## Images

![JBL MA6004 4-Channel Full-Range Marine Amplifier - Image 1](https://m.media-amazon.com/images/I/61HpsLhyNJL.jpg)
![JBL MA6004 4-Channel Full-Range Marine Amplifier - Image 2](https://m.media-amazon.com/images/I/61nskGKh-gL.jpg)
![JBL MA6004 4-Channel Full-Range Marine Amplifier - Image 3](https://m.media-amazon.com/images/I/7177+-FiC5L.jpg)
![JBL MA6004 4-Channel Full-Range Marine Amplifier - Image 4](https://m.media-amazon.com/images/I/71j4wTBhWoL.jpg)

## Questions & Answers

**Q: how many "watts " is this amp?**
A: 150w max x 4 channels = 600max watts (This is peak power the amp can only put out for an instant)or60w RMS x 4 channels= 240w RMS (RMS is what the amp can put out continuous)

**Q: can this amp be directly attached to ipod?**
A: never tried but if it has a red and white rca input. you can buy an adaptor that goes from ipod directly into it then into speaker. This is a low cost high output amp. I have three of these. At 99.00 you could replace it every year for 3-5 years for the price of some the real expensive ones. I have it hooked up in my boat to 8 speakers and it rocks the beach-. JL audio speakers  Your best bet is to buy this and good speakers.

**Q: Doing a starter system for my son. i have  a jbl cl0012 and a duel dls 12" sub. i know there are many ways to wire this and im a novice.how would you**
A: I would only run speakers on this amp and get a single channel amp for sub. Do not put too much pressure on adjustment screws on this amp. I damaged one on mine.

**Q: Is this enough amp for 2 pairs of polk db652? trying to optimize.**
A: I drive 2 pair of 6” fusion speakers and it gives them a workout. Great amp but a litte big

## Customer Reviews

### ⭐⭐⭐⭐⭐ Amazing amp, perfect for cooler stereo
*by E***N on June 11, 2014*

I purchased this bad boy to power my Igloo cooler stereo that I built for floating the local rivers and getting the parties started out in the sticks. I paired it with two JBL Marine 6x9s (bridged), and all I can say is that this thing is VERY loud and crystal clear with absolutely no distortion at high volumes. In fact, I think I may have gone a little overboard on my project - we brought the cooler out disperse camping the other weekend and it sounded like we were having a rave in the forest. Anyway, I digress. Back to the amp... I've seen a lot of reviews on here about overheating issues. Let me tell you, I ran this amp sitting inside of my cooler in the beating sun here in Sacramento with outside temps of over 95 degrees playing music at loud levels for hours with absolutely no issues whatsoever. Granted, the cooler may be insulating the amp a little bit from the temps, but still, I have no fans or other cooling devices inside. I haven't had a chance to test the marinized circuit board (and, quite frankly, I hope I don't run into a scenario where I'd need to, because that would mean my cooler was sinking), but the build quality on the amp is superb. It definitely looks like it could stand up the the harsh marine elements in a semi-exposed environment. This amp provides all of your typical adjustment knobs on the back: input gain, bass boost, high pass/low pass filter and frequency adjustment for both channels. The bass boost function works great, and really seems to add a lot of extra "umph" to my 6x9s. I've seen a few people posting general concerns about plugging a phone or other audio device directly into this amp using a 3.5mm headphone to RCA adapter (to avoid installing a deck). I can attest that you'll have absolutely no problem doing this with this amp; you will not need a pre-amp. The amp gets plenty loud using only the adapter cable. For those wanting to bridge 6x9s or other speakers, simply plug an extra RCA cable into the AUX output and then to the Rear input and plug your 3.5mm headphone to RCA adapter into the Front Input. A lot of you probably already know how to do this, but I figured I'd mention it for any newbies out there (like I was!) So, if you're looking for a LOUD, crisp, sexy looking amp that will keep your boat or other water toys rocking, this is the one for you. I've had it for a couple months now and it has performed flawlessly. Side note: This amp has three bright, blue power lights directly under the JBL logo. Something to consider if minor aesthetics are to be taken into account during your system build. UPDATE: June 2016 After two years, this amp is still kicking just fine. I've taken it out camping and floating over 20 times now and it sounds the same it did the day I bought it, and I've definitely put it through some abuse. All is not perfect, however. Some of the overheating issues that other buyers have mentioned have come to fruition. These overheating episodes only happen on very hot days when the amp is blasting at very high volumes. Since my amp is in an enclosed cooler, overheating is almost inevitable. I'm not going to knock any stars off my review; this is still an excellent buy and the sound quality cannot be beat. I plan on installing a pair of computer fans in the cooler to help cool this thing down when I really crank the volume on hot summer days.

### ⭐⭐⭐ Solid amp, good price, efficiency not it's strong point.
*by E***J on February 17, 2016*

I bought this amplifier to build a portable 2.1 system. The bridging features, crossovers, and independent gain controls are awesome and make a multichannel setup a breeze to hook up. Do note that if the front and rear channels are to receive the same signal, RCA jumpers from the pass through must be connected to the b channels externally. The three blue lights on the top are very bright. For size constrained projects, you might consider another product, so name sure you review the dimensions. Because I had the amp running off a small 12 volt agm sla battery, I was originally concerned with power consumption, and the amplifier gets quite warm. Although I originally attributed most of this to an inefficient design, the length of time the amp can run on such a small battery (18ah) has convinced me to look elsewhere for at least part of the heat build up. After thinking about it, I think that the fanless design, important for the marine grade build, may explain the issues some people have described. Most amplifiers with decent power output at least have vents, many with fans. This is a SEALED amplifier. It will get hot. Ensure proper and this amp works great. The features are nice, the price is right at ~ $100, and pungent l plenty of juice for most systems. I'm satisfied with this product, 4 stars because it won't work for everybody. Edit: lost a star because screw terminal stripped out way too easily

### ⭐⭐⭐⭐⭐ An amazing Amp
*by A***L on July 13, 2011*

A great amp at a great price. I connected this amp to the bow thruster battery in my boat since its the most convenient location. Ran it for about four hours with the boat off and the AGM 100 amp hour battery had very little drain and could have gone for another 10. The amp is connected to two Bose 131 marine speakers and two JBL marine speakers. Even at close to full volume I could not hear any distortion. If you want an amazing amp that won't drain your boats battery then this is the one to buy.

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-21*