Description
Included in this kit
This bundle includes a MTX MA400.4 400-Watt RMS Full Range Class D 4-Channel Marine Amplifier, and 2x MTX MA8C-B - Marine 8” 150-Watt RMS 4Ω Coaxial Speaker Pair IP-67 Rated Black with RGB Lighting and Customizable Grille.
1x MTX MA400.4 400-Watt RMS Full Range Class D 4-Channel Marine Amplifier (MA400.4)
Reliable full-range power in a marine-ready design. The MA400.4 from MTX delivers 100 watts RMS per channel with clean, balanced output and Class D efficiency. Built to perform in tough marine conditions, it features conformal coating, stainless steel hardware, and the same advanced protection and tuning controls you expect from MTX.
Big Power in a Compact Design
The MA400.4 delivers 100 watts RMS per channel at 2Ω, pushing crisp, distortion-free sound through every speaker in your setup. Its compact footprint makes it easy to install without sacrificing performance. Each amp includes a Dyno Power Rating Certificate, confirming that you’re getting real, verified power.
Features
Conformal Coated Circuit Board for Water & Salt Resistance
Stainless Steel Hardware to Prevent Corrosion
400 Watts RMS Power Output
Reliable Full-Range Class-D Circuit Design
Compact Size for Flexible Installation
10V High-Level Audio Input Compatibility
High-Quality Tiffany-Style RCA Input
Power and Protection LED Indicator Light
Surface Mount Component Technology
Direct Insert Power and Speaker Terminals
Thermal, Short, and Over/Under Voltage Protection
Clip Detection Light for Tuning Optimization
Dyno Power Rating Certificate
SPECIFICATIONS
Description: 4-Channel
Topology: Full Range Class D
4Ω RMS Power Output: 50W x 4 Channels
2Ω RMS Power Output: 100W x 4 Channels
4Ω RMS Bridged Power Output : 200W x 2 Channels
THD: < 0.1%
Signal to Noise Ratio: > 98dB
Frequency Response: 20Hz - 20KHz
Crossover: 40Hz - 400Hz
Maximum Input Signal: 10V
Warranty Period: 24 months from date of purchase
Dimensions Length: 6 ³⁄₄” (171mm) Width: 7” (178mm) Depth: 2" (51mm) Weight: 4.88Lbs (2.21Kg)
2x MTX MA8C-B - Marine 8” 150-Watt RMS 4Ω Coaxial Speaker Pair IP-67 Rated Black with RGB Lighting and Customizable Grille (MA8C-B)
MA8C-B Marine 8" 150-Watt RMS 4Ω Coaxial Speaker Pair with RGB Lighting
The MTX MA8C-B is an 8-inch marine coaxial speaker pair designed for clear, consistent audio in harsh marine and open-air environments. With weather-tested construction, balanced full-range tuning, integrated RGB LED lighting, and a black finish with customizable grille styling, it is built for dependable use in boats and other exposed audio systems.
Overview
8" Marine Coaxials for Higher-Output Open-Air Audio
The MA8C-B is built as an 8-inch marine coaxial speaker for boats and other open-air applications where both durability and sound quality matter. Its larger driver format, weather-tested construction, and balanced coaxial design make it a practical option for marine systems that need dependable long-term use.
Sold as a speaker pair, the MA8C-B combines marine-focused protection, efficient output, customizable RGB styling, and installation-friendly terminals in a black-finish package suited for exposed environments.
- 8" marine coaxial speaker pair.
- Built for boats and other open-air systems.
- Designed for consistent full-range audio in harsh conditions.
Marine Construction
Weather-Tested for Harsh Conditions
The MA8C-B is designed to withstand prolonged exposure to sun, water, and salt. The front side is IP67 rated and the speaker has passed 500 hours of ASTM G154 UV testing and 500 hours of ISO 16750-4 salt spray testing. An ASA impact-resistant grille adds protection against physical wear in marine environments.
- Front-side IP67 rated.
- 500-hour UV testing and 500-hour salt spray testing.
- ASA impact-resistant grille for added durability.
Feature Highlights
What the MA8C-B Adds to a Build
Driver Design
8" Polypropylene Woofer with Dual Tweeters
The MA8C-B uses an 8-inch polypropylene woofer paired with dual Teteron dome tweeters to create a balanced full-range presentation. The provided product data emphasizes smooth midrange response, clear highs, and controlled low-end performance for marine and open-air listening.
- 8" polypropylene woofer.
- Dual Teteron dome tweeters.
- Balanced full-range marine speaker tuning.
Styling & Installation
RGB Lighting with Custom-Finish Flexibility
Integrated RGB LED lighting gives the MA8C-B added visual impact, while the paintable grille overlay helps create a more coordinated installation. Quick-disconnect speaker and RGB terminals add practical setup benefits for marine installs.
- Integrated RGB LED lighting.
- Paintable grille overlay.
- Quick-disconnect speaker and RGB terminals.
- Black finish for marine and custom installs.
| Model | MTX MA8C-B |
| Type | 8" coaxial speaker pair |
| Color | Black |
| RMS Power Handling | 150 watts |
| Peak Power Handling | 300 watts |
| Impedance | 4Ω |
| Sensitivity (2.83V/1m) | 90.8dB |
| Frequency Response | 50Hz - 20kHz |
| Woofer | 8" polypropylene woofer |
| Tweeters | Dual Teteron dome tweeters |
| Lighting | Integrated RGB LED lighting |
| Grille | ASA impact-resistant grille with paintable overlay |
| Terminals | Quick disconnect speaker and RGB terminals |
| UV Testing | ASTM G154 UV testing – 500 hours |
| Salt Spray Testing | ISO 16750-4 salt spray testing – 500 hours (front side only) |
| Water Resistance | IP67 rated (front side only) |
| Compliance | CEA-2031 complaint |
| Overall Diameter | 8 9/16" (217mm) |
| Screw Mounting Diameter | 7 11/16" (194mm) |
| Overall Height | 4 15/16" (125mm) |
| Mounting Depth | 3 3/16" (80mm) |
| Cut-out Diameter | 6 3/4" (171mm) |
| Grille Height | 1 13/16" (45mm) |
The MA8C-B is described as a marine-ready 8-inch coaxial speaker pair for boats and open-air systems where weather resistance, dependable output, and customizable styling are all important.